moby: build/deploy kaiteki

2022-10-09 04:17:04 -07:00
690 changed files with 8281 additions and 132219 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,2 @@
-/keep
 result
-result-*
 /secrets/local.nix
-/working
--- a/.sops.yaml
+++ b/.sops.yaml
@@ -8,7 +8,7 @@ keys:
  - &host_servo age1tzlyex2z6t88tg9h82943e39shxhmqeyr7ywhlwpdjmyqsndv3qq27x0rf
  - &host_moby age18vq5ktwgeaysucvw9t67drqmg5zd5c5k3le34yqxckkfj7wqdqgsd4ejmt
 creation_rules:
-  - path_regex: secrets/common*
+  - path_regex: secrets/universal*
    key_groups:
    - age:
      - *user_desko_colin
@@ -23,25 +23,11 @@ creation_rules:
    key_groups:
    - age:
      - *user_desko_colin
-      - *user_lappy_colin
      - *user_servo_colin
      - *host_servo
-  - path_regex: secrets/desko*
+  - path_regex: secrets/desko.yaml$
    key_groups:
    - age:
      - *user_desko_colin
      - *user_lappy_colin
      - *host_desko
-  - path_regex: secrets/lappy*
-    key_groups:
-    - age:
-      - *user_lappy_colin
-      - *user_desko_colin
-      - *host_lappy
-  - path_regex: secrets/moby*
-    key_groups:
-    - age:
-      - *user_desko_colin
-      - *user_lappy_colin
-      - *user_moby_colin
-      - *host_moby
--- a/README.md
+++ b/README.md
@@ -1,123 +0,0 @@
-## What's Here
-
-this is the top-level repo from which i configure/deploy all my NixOS machines:
- desktop
- laptop
- server
- mobile phone (Pinephone)
-
-everything outside of <./hosts/> and <./secrets/> is intended for export, to be importable for use by 3rd parties.
-the only hard dependency for my exported pkgs/modules should be [nixpkgs][nixpkgs].
-building <./hosts/> will require [sops][sops].
-
-you might specifically be interested in these files (elaborated further in #key-points-of-interest):
- [`sxmo-utils-latest`](./pkgs/additional/sxmo-utils/default.nix)
-  - [example SXMO deployment](./hosts/modules/gui/sxmo/default.nix)
- [my implementation of impermanence](./modules/persist/default.nix)
- my way of deploying dotfiles/configuring programs per-user:
-  - <./modules/fs/default.nix>
-  - <./modules/programs.nix>
-  - <./modules/users.nix>
-
-[nixpkgs]: https://github.com/NixOS/nixpkgs
-[sops]: https://github.com/Mic92/sops-nix
-[uninsane-org]: https://uninsane.org
-
-## Using This Repo In Your Own Config
-
-this should be a pretty "standard" flake. just reference it, and import either
- `nixosModules.sane` (for the modules)
- `overlays.pkgs` (for the packages)
-
-or follow the instructions [here][NUR] to use it via the Nix User Repositories.
-
-[NUR]: https://nur.nix-community.org/
-
-## Layout
- `doc/`
-    - instructions for tasks i find myself doing semi-occasionally in this repo.
- `hosts/`
-    - the bulk of config which isn't factored with external use in mind.
-    - that is, if you were to add this repo to a flake.nix for your own use,
-      you won't likely be depending on anything in this directory.
- `integrations/`
-    - code intended for consumption by external tools (e.g. the Nix User Repos)
- `modules/`
-    - config which is gated behind `enable` flags, in similar style to nixpkgs'
-      `nixos/` directory.
-    - if you depend on this repo, it's most likely for something in this directory.
- `nixpatches/`
-    - literally, diffs i apply atop upstream nixpkgs before performing further eval.
- `overlays/`
-    - exposed via the `overlays` output in `flake.nix`.
-    - predominantly a list of `callPackage` directives.
- `pkgs/`
-    - derivations for things not yet packaged in nixpkgs.
-    - derivations for things from nixpkgs which i need to `override` for some reason.
-    - inline code for wholly custom packages (e.g. `pkgs/additional/sane-scripts/` for CLI tools
-      that are highly specific to my setup).
- `scripts/`
-    - scripts which aren't reachable on a deployed system, but may aid manual deployments
- `secrets/`
-    - encrypted keys, API tokens, anything which one or more of my machines needs
-      read access to but shouldn't be world-readable.
-    - not much to see here
- `templates/`
-    - exposed via the `templates` output in `flake.nix`.
-    - used to instantiate short-lived environments.
-    - used to auto-fill the boiler-plate portions of new packages.
-
-
-## Key Points of Interest
-
-i.e. you might find value in using these in your own config:
-
- `modules/fs/`
-    - use this to statically define leafs and nodes anywhere in the filesystem,
-      not just inside `/nix/store`.
-    - e.g. specify that `/var/www` should be:
-        - owned by a specific user/group
-        - set to a specific mode
-        - symlinked to some other path
-        - populated with some statically-defined data
-        - populated according to some script
-        - created as a dependency of some service (e.g. `nginx`)
-    - values defined here are applied neither at evaluation time _nor_ at activation time.
-        - rather, they become systemd services.
-        - systemd manages dependencies
-        - e.g. link `/var/www -> /mnt/my-drive/www` only _after_ `/mnt/my-drive/www` appears)
-    - this is akin to using [Home Manager's][home-manager] file API -- the part which lets you
-      statically define `~/.config` files -- just with a different philosophy.
- `modules/persist/`
-    - my alternative to the Impermanence module.
-    - this builds atop `modules/fs/` to achieve things stock impermanence can't:
-        - persist things to encrypted storage which is unlocked at login time (pam_mount).
-        - "persist" cache directories -- to free up RAM -- but auto-wipe them on mount
-          and encrypt them to ephemeral keys so they're unreadable post shutdown/unmount.
- `modules/programs.nix`
-    - like nixpkgs' `programs` options, but allows both system-wide or per-user deployment.
-    - allows `fs` and `persist` config values to be gated behind program deployment:
-        - e.g. `/home/<user>/.mozilla/firefox` is persisted only for users who
-          `sane.programs.firefox.enableFor.user."<user>" = true;`
- `modules/users.nix`
-    - convenience layer atop the above modules so that you can just write
-      `fs.".config/git"` instead of `fs."/home/colin/.config/git"`
-
-some things in here could easily find broader use. if you would find benefit in
-them being factored out of my config, message me and we could work to make that happen.
-
-[home-manager]: https://github.com/nix-community/home-manager
-
-## Mirrors
-
-this repo exists in a few known locations:
- primary: <https://git.uninsane.org/colin/nix-files>
- mirror: <https://github.com/nix-community/nur-combined/tree/master/repos/colinsane>
-
-## Contact
-
-if you want to contact me for questions, or collaborate to split something useful into a shared repo, etc,
-you can reach me via any method listed [here](https://uninsane.org/about).
-patches, for this repo or any other i host, will be warmly welcomed in any manner you see fit:
-`git send-email`, DM'ing the patch over Matrix/Lemmy/ActivityPub/etc, even a literal PR where you
-link me to your own clone.
--- a/TODO.md
+++ b/TODO.md
@@ -1,113 +1,16 @@
-## BUGS
- why i need to manually restart `wireguard-wg-ovpns` on servo periodically
-  - else DNS fails
- ringer (i.e. dino incoming call) doesn't prevent moby from sleeping
-
-## REFACTORING:
-
-### sops/secrets
- attach secrets to the thing they're used by (sane.programs)
- rework secrets to leverage `sane.fs`
- remove sops activation script as it's covered by my systemd sane.fs impl
-
-### roles
- allow any host to take the role of `uninsane.org`
-  - will make it easier to test new services?
-
-### upstreaming
- split out a sxmo module usable by NUR consumers
- bump nodejs version in lemmy-ui
- add updateScripts to all my packages in nixpkgs
- fix lightdm-mobile-greeter for newer libhandy
- port zecwallet-lite to a from-source build
- REVIEW/integrate jellyfin dataDir config: <https://github.com/NixOS/nixpkgs/pull/233617>
- remove `libsForQt5.callPackage` broadly: <https://github.com/NixOS/nixpkgs/issues/180841>
-
-#### upstreaming to non-nixpkgs repos
- gtk: build schemas even on cross compilation: <https://github.com/NixOS/nixpkgs/pull/247844>
- sxmo: add new app entries
+# features/tweaks
+- emoji picker application
+- find a Masto/Pleroma app which works on mobile
+- remove hardcoded uid/gids outside of allocations.nix (used in impermanence code -- replace with username/groupname)


-## IMPROVEMENTS:
-### security/resilience
- matrix/ntfy: automatically add the ntfy.uninsane.org push URL as part of synapse launch
- ntfy: use a more secure topic
- validate duplicity backups!
- encrypt more ~ dirs (~/archives, ~/records, ..?)
-  - best to do this after i know for sure i have good backups
- have `sane.programs` be wrapped such that they run in a cgroup?
-  - at least, only give them access to the portion of the fs they *need*.
-  - Android takes approach of giving each app its own user: could hack that in here.
-  - **systemd-run** takes a command and runs it in a temporary scope (cgroup)
-    - presumably uses the same options as systemd services
-    - see e.g. <https://github.com/NixOS/nixpkgs/issues/113903#issuecomment-857296349>
-  - flatpak does this, somehow
-  - apparmor?  SElinux?  (desktop) "portals"?
-  - see Spectrum OS; Alyssa Ross; etc
-  - bubblewrap-based sandboxing: <https://github.com/nixpak/nixpak>
- canaries for important services
-  - e.g. daily email checks; daily backup checks
-  - integrate `nix check` into Gitea actions?
-
-### user experience
-#### moby
- fix cpuidle (gets better power consumption): <https://xnux.eu/log/077.html>
- install apps:
-  - display QR codes for WiFi endpoints: <https://linuxphoneapps.org/apps/noappid.wisperwind.wifi2qr/>
-  - shopping list: <https://linuxphoneapps.org/apps/ro.hume.cosmin.shoppinglist/>
-  - offline Wikipedia
- SwayNC:
-  - don't show MPRIS if no players detected
-    - this is a problem of playerctld, i guess
-  - add option to change audio output
-  - fix colors (red alert) to match overall theme
-  - extend width to 100% of portrait mode
- moby: tune GPS
-  - run only geoclue, and not gpsd, to save power?
-  - tune QGPS setting in eg25-control, for less jitter?
-  - direct mepo to prefer gpsd, with fallback to geoclue, for better accuracy?
-  - configure geoclue to do some smoothing?
-  - manually do smoothing, as some layer between mepo and geoclue/gpsd?
- moby: show battery state on ssh login
- moby: improve gPodder launch time
- sxmo: port to swaybar like i use on desktop
-  - users in #sxmo claim it's way better perf
- sxmo: fix youtube scripts (package youtube-cli)
- moby: theme GTK apps (i.e. non-adwaita styles)
-  - combine multiple icon themes to get one which has the full icon set?
-  - get adwaita-icon-theme to ship everything even when cross-compiled?
-  - especially, make the menubar collapsible
-  - try Gradience tool specifically for theming adwaita? <https://linuxphoneapps.org/apps/com.github.gradienceteam.gradience/>
- phog: remove the gnome-shell runtime dependency to save hella closure size
-
-#### non-moby
- neovim: set up language server (lsp; rnix-lsp; nvim-lspconfig)
- Helix: make copy-to-system clipboard be the default
- firefox/librewolf: persist history
-  - just not cookies or tabs
- package Nix/NixOS docs for Zeal
-  - install [doc-browser](https://github.com/qwfy/doc-browser)
-  - this supports both dash (zeal) *and* the datasets from <https://devdocs.io> (which includes nix!)
-  - install [devhelp](https://wiki.gnome.org/Apps/Devhelp)  (gnome)
- have xdg-open parse `<repo:...> URIs (or adjust them so that it _can_ parse)
- sane-bt-search: show details like 5.1 vs stereo, h264 vs h265
-  - maybe just color these "keywords" in all search results?
- uninsane.org: make URLs relative to allow local use (and as offline homepage)
- email: fix so that local mail doesn't go to junk
-  - git sendmail flow adds the DKIM signatures, but gets delivered locally w/o having the sig checked, so goes into Junk
-  - could change junk filter from "no DKIM success" to explicit "DKIM failed"
-
-### perf
- add `pkgs.impure-cached.<foo>` package set to build things with ccache enabled
-  - every package here can be auto-generated, and marked with some env var so that it doesn't pollute the pure package set
-  - would be super handy for package prototyping!
- get moby to build without binfmt emulation (i.e. make all emulation explicit)
-  - then i can distribute builds across servo + desko, and also allow servo to pull packages from desko w/o worrying about purity
-
-
-## NEW FEATURES:
- migrate MAME cabinet to nix
-  - boot it from PXE from servo?
- deploy to new server, and use it as a remote builder
- enable IPv6
- package lemonade lemmy app: <https://linuxphoneapps.org/apps/ml.mdwalters.lemonade/>
+# speed up cross compiling
+- <https://nixos.wiki/wiki/Cross_Compiling>
+- <https://nixos.wiki/wiki/NixOS_on_ARM>
+```nix
+   overlays = [{ ... }: {
+     nixpkgs.crossSystem.system = "aarch64-linux";
+   }];
+```
+- <https://github.com/nix-community/aarch64-build-box>
+	- apply for access to the community arm build box
--- a/default.nix
+++ b/default.nix
@@ -1,9 +0,0 @@
-# limited, non-flake interface to this repo.
-# this file exposes the same view into `pkgs` which the flake would see when evaluated.
-#
-# the primary purpose of this file is so i can run `updateScript`s which expect
-# the root to be `default.nix`
-{ pkgs ? import <nixpkgs> {} }:
-pkgs.appendOverlays [
-  (import ./overlays/all.nix)
-]
--- a/doc/adding-a-program.md
+++ b/doc/adding-a-program.md
@@ -1,13 +0,0 @@
-to ship `pkgs.foo` on some host, either:
- add it as an entry in `suggestedPrograms` to the appropriate category in `hosts/common/programs/assorted.nix`, or
- `sane.programs.foo.enableFor.user.colin = true` in `hosts/by-name/myhost/default.nix`
-
-if the program needs customization (persistence, configs, secrets):
- add a file for it at `hosts/common/programs/<foo>.nix`
- set the options, `sane.programs.foo.{fs,persist}`
-
-if it's unclear what fs paths a program uses:
- run one of these commands, launch the program, run it again, and `diff`:
-  - `du -x --apparent-size ~`
-  - `find ~ -xdev`
- or, inspect the whole tmpfs root with `ncdu -x /`
--- a/flake.lock
+++ b/flake.lock
@@ -1,93 +1,140 @@
 {
  "nodes": {
-    "flake-utils": {
+    "home-manager": {
      "inputs": {
-        "systems": "systems"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
      },
      "locked": {
-        "lastModified": 1687709756,
-        "narHash": "sha256-Y5wKlQSkgEK2weWdOu4J3riRd+kV/VCgHsqLNTTWQ/0=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7",
+        "lastModified": 1656169755,
+        "narHash": "sha256-Nlnm4jeQWEGjYrE6hxi/7HYHjBSZ/E0RtjCYifnNsWk=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "4a3d01fb53f52ac83194081272795aa4612c2381",
        "type": "github"
      },
      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "nix-community",
+        "ref": "release-22.05",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "impermanence": {
+      "locked": {
+        "lastModified": 1661933071,
+        "narHash": "sha256-RFgfzldpbCvS+H2qwH+EvNejvqs+NhPVD5j1I7HQQPY=",
+        "owner": "nix-community",
+        "repo": "impermanence",
+        "rev": "def994adbdfc28974e87b0e4c949e776207d5557",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "impermanence",
        "type": "github"
      }
    },
    "mobile-nixos": {
      "flake": false,
      "locked": {
-        "lastModified": 1694749521,
-        "narHash": "sha256-MiVokKlpcJmfoGuWAMeW1En7gZ5hk0rCQArYm6P9XCc=",
+        "lastModified": 1664852186,
+        "narHash": "sha256-t0FhmTf3qRs8ScR8H9Rq7FAxptNELLSpxZG2ALL1HnE=",
        "owner": "nixos",
        "repo": "mobile-nixos",
-        "rev": "d25d3b87e7f300d8066e31d792337d9cd7ecd23b",
+        "rev": "ca872f1a617674c4045e880aab8a45037e73700b",
        "type": "github"
      },
      "original": {
        "owner": "nixos",
-        "ref": "d25d3b87e7f300d8066e31d792337d9cd7ecd23b",
        "repo": "mobile-nixos",
        "type": "github"
      }
    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1665081174,
+        "narHash": "sha256-6hsmzdhdy8Kbvl5e0xZNE83pW3fKQvNiobJkM6KQrgA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "598f83ebeb2235435189cf84d844b8b73e858e0f",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-22_05": {
+      "locked": {
+        "lastModified": 1665279158,
+        "narHash": "sha256-TpbWNzoJ5RaZ302dzvjY2o//WxtOJuYT3CnDj5N69Hs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b3783bcfb8ec54e0de26feccfc6cc36b8e202ed5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-22.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
    "nixpkgs-stable": {
      "locked": {
-        "lastModified": 1698544399,
-        "narHash": "sha256-vhRmPyEyoPkrXF2iykBsWHA05MIaOSmMRLMF7Hul6+s=",
+        "lastModified": 1665132027,
+        "narHash": "sha256-zoHPqSQSENt96zTk6Mt1AP+dMNqQDshXKQ4I6MfjP80=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "d87c5d8c41c9b3b39592563242f3a448b5cc4bc9",
+        "rev": "9ecc270f02b09b2f6a76b98488554dd842797357",
        "type": "github"
      },
      "original": {
-        "owner": "NixOS",
-        "ref": "release-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "ref": "nixos-22.05",
+        "type": "indirect"
      }
    },
-    "nixpkgs-unpatched": {
+    "nixpkgs_2": {
      "locked": {
-        "lastModified": 1698611440,
-        "narHash": "sha256-jPjHjrerhYDy3q9+s5EAsuhyhuknNfowY6yt6pjn9pc=",
-        "owner": "nixos",
+        "lastModified": 1665197809,
+        "narHash": "sha256-dRUzv/zNYV2EYtnxFG31pPBk0nErT+MBTu6ZJHm1o2A=",
+        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "0cbe9f69c234a7700596e943bfae7ef27a31b735",
+        "rev": "7b06206fa24198912cea58de690aa4943f238fbf",
        "type": "github"
      },
      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
+        "home-manager": "home-manager",
+        "impermanence": "impermanence",
        "mobile-nixos": "mobile-nixos",
-        "nixpkgs-unpatched": "nixpkgs-unpatched",
-        "sops-nix": "sops-nix",
-        "uninsane-dot-org": "uninsane-dot-org"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-stable": "nixpkgs-stable",
+        "sops-nix": "sops-nix"
      }
    },
    "sops-nix": {
      "inputs": {
-        "nixpkgs": [
-          "nixpkgs-unpatched"
-        ],
-        "nixpkgs-stable": "nixpkgs-stable"
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-22_05": "nixpkgs-22_05"
      },
      "locked": {
-        "lastModified": 1698548647,
-        "narHash": "sha256-7c03OjBGqnwDW0FBaBc+NjfEBxMkza+dxZGJPyIzfFE=",
+        "lastModified": 1665289655,
+        "narHash": "sha256-j1Q9mNBhbzeJykhObiXwEGres9qvP4vH7gxdJ+ihkLI=",
        "owner": "Mic92",
        "repo": "sops-nix",
-        "rev": "632c3161a6cc24142c8e3f5529f5d81042571165",
+        "rev": "0ce0449e6404c4ff9d1b7bd657794ae5ca54deb3",
        "type": "github"
      },
      "original": {
@@ -95,42 +142,6 @@
        "repo": "sops-nix",
        "type": "github"
      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "uninsane-dot-org": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": [
-          "nixpkgs-unpatched"
-        ]
-      },
-      "locked": {
-        "lastModified": 1698634059,
-        "narHash": "sha256-+Oyv6vDyCtBzab/5cTG0nUrHD9gj7KgGfD4D1Rn4fCk=",
-        "ref": "refs/heads/master",
-        "rev": "2419750ca98fc04af42c91e50c49a29c68d465d2",
-        "revCount": 210,
-        "type": "git",
-        "url": "https://git.uninsane.org/colin/uninsane"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://git.uninsane.org/colin/uninsane"
-      }
    }
  },
  "root": "root",
--- a/flake.nix
+++ b/flake.nix
@@ -1,176 +1,71 @@
-# FLAKE FEEDBACK:
-# - if flake inputs are meant to be human-readable, a human should be able to easily track them down given the URL.
-#   - this is not the case with registry URLs, like `nixpkgs/nixos-22.11`.
-#   - this is marginally the case with schemes like `github:nixos/nixpkgs`.
-#   - given the *existing* `git+https://` scheme, i propose expressing github URLs similarly:
-#     - `github+https://github.com/nixos/nixpkgs/tree/nixos-22.11`
-#     - this would allow for the same optimizations as today's `github:nixos/nixpkgs`, but without obscuring the source.
-#       a code reader could view the source being referenced simply by clicking the https:// portion of that URI.
-# - need some way to apply local patches to inputs.
-#
-#
-# DEVELOPMENT DOCS:
-# - Flake docs: <https://nixos.wiki/wiki/Flakes>
-# - Flake RFC: <https://github.com/tweag/rfcs/blob/flakes/rfcs/0049-flakes.md>
-#   - Discussion: <https://github.com/NixOS/rfcs/pull/49>
+# docs:
+# - <https://nixos.wiki/wiki/Flakes>
 # - <https://serokell.io/blog/practical-nix-flakes>
-#
-#
-# COMMON OPERATIONS:
-# - update a specific flake input:
-#   - `nix flake lock --update-input nixpkgs`

 {
-  # XXX: use the `github:` scheme instead of the more readable git+https: because it's *way* more efficient
-  # preferably, i would rewrite the human-readable https URLs to nix-specific github: URLs with a helper,
-  # but `inputs` is required to be a strict attrset: not an expression.
  inputs = {
-    # branch workflow:
-    # - daily:
-    #   - nixos-unstable cut from master after enough packages have been built in caches.
-    # - every 6 hours:
-    #   - master auto-merged into staging.
-    #   - staging-next auto-merged into staging.
-    # - manually, approximately once per month:
-    #   - staging-next is cut from staging.
-    #   - staging-next merged into master.
-    #
-    # which branch to source from?
-    # - for everyday development, prefer `nixos-unstable` branch, as it provides good caching.
-    # - if need to test bleeding updates (e.g. if submitting code into staging):
-    #   - use `staging-next` if it's been cut (i.e. if there's an active staging-next -> master PR)
-    #   - use `staging` if no staging-next branch has been cut.
-    #
-    # <https://github.com/nixos/nixpkgs/tree/nixos-unstable>
-    nixpkgs-unpatched.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-    # nixpkgs-unpatched.url = "github:nixos/nixpkgs?ref=staging-next";
-    # nixpkgs-unpatched.url = "github:nixos/nixpkgs?ref=staging";
-
+    nixpkgs-stable.url = "nixpkgs/nixos-22.05";
+    nixpkgs.url = "nixpkgs/nixos-unstable";
    mobile-nixos = {
-      # <https://github.com/nixos/mobile-nixos>
-      # only used for building disk images, not relevant after deployment
-      # TODO: replace with something else. commit `0f3ac0bef1aea70254a3bae35e3cc2561623f4c1`
-      # replaces the imageBuilder with a "new implementation from celun" and wildly breaks my use.
-      # pinning to d25d3b... is equivalent to holding at 2023-09-15
-      url = "github:nixos/mobile-nixos?ref=d25d3b87e7f300d8066e31d792337d9cd7ecd23b";
+      url = "github:nixos/mobile-nixos";
      flake = false;
    };
-    sops-nix = {
-      # <https://github.com/Mic92/sops-nix>
-      # used to distribute secrets to my hosts
-      url = "github:Mic92/sops-nix";
-      # inputs.nixpkgs.follows = "nixpkgs";
-      inputs.nixpkgs.follows = "nixpkgs-unpatched";
-    };
-    uninsane-dot-org = {
-      # provides the package to deploy <https://uninsane.org>, used only when building the servo host
-      url = "git+https://git.uninsane.org/colin/uninsane";
-      # inputs.nixpkgs.follows = "nixpkgs";
-      inputs.nixpkgs.follows = "nixpkgs-unpatched";
+    home-manager = {
+      url = "github:nix-community/home-manager/release-22.05";
+      inputs.nixpkgs.follows = "nixpkgs";
    };
+    # TODO: set these up to follow our nixpkgs?
+    sops-nix.url = "github:Mic92/sops-nix";
+    impermanence.url = "github:nix-community/impermanence";
  };

-  outputs = {
-    self,
-    nixpkgs-unpatched,
-    mobile-nixos,
-    sops-nix,
-    uninsane-dot-org,
-    ...
-  }@inputs:
+  outputs = { self, nixpkgs, nixpkgs-stable, mobile-nixos, home-manager, sops-nix, impermanence }:
+  let
+    patchedPkgs = system: nixpkgs.legacyPackages.${system}.applyPatches {
+      name = "nixpkgs-patched-uninsane";
+      src = nixpkgs;
+      patches = import ./nixpatches/list.nix nixpkgs.legacyPackages.${system}.fetchpatch;
+    };
+    # return something which behaves like `pkgs`, for the provided system
+    # `local` = architecture of builder. `target` = architecture of the system beying deployed to
+    nixpkgsFor = local: target: import (patchedPkgs target) { crossSystem = target; localSystem = local; };
+    # evaluate ONLY our overlay, for the provided system
+    customPackagesFor = local: target: import ./pkgs/overlay.nix (nixpkgsFor local target) (nixpkgsFor local target);
+    decl-machine = { name, local, target }:
    let
-      inherit (builtins) attrNames elem listToAttrs map mapAttrs;
-      # redefine some nixpkgs `lib` functions to avoid the infinite recursion
-      # of if we tried to use patched `nixpkgs.lib` as part of the patching process.
-      mapAttrs' = f: set:
-        listToAttrs (map (attr: f attr set.${attr}) (attrNames set));
-      optionalAttrs = cond: attrs: if cond then attrs else {};
-      # mapAttrs but without the `name` argument
-      mapAttrValues = f: mapAttrs (_: f);
-
-      # rather than apply our nixpkgs patches as a flake input, do that here instead.
-      # this (temporarily?) resolves the bad UX wherein a subflake residing in the same git
-      # repo as the main flake causes the main flake to have an unstable hash.
-      nixpkgs = (import ./nixpatches/flake.nix).outputs {
-        self = nixpkgs;
-        nixpkgs = nixpkgs-unpatched;
-      } // {
-        # provide values that nixpkgs ordinarily sources from the flake.lock file,
-        # inaccessible to it here because of the import-from-derivation.
-        # rev and shortRev seem to not always exist (e.g. if the working tree is dirty),
-        # so those are made conditional.
-        #
-        # these values impact the name of a produced nixos system. having date/rev in the
-        # `readlink /run/current-system` store path helps debuggability.
-        inherit (self) lastModifiedDate lastModified;
-      } // optionalAttrs (self ? rev) {
-        inherit (self) rev;
-      } // optionalAttrs (self ? shortRev) {
-        inherit (self) shortRev;
-      };
-
-      nixpkgsCompiledBy = system: nixpkgs.legacyPackages."${system}";
-
-      evalHost = { name, local, target }: nixpkgs.lib.nixosSystem {
-        system = target;
-        modules = [
-          {
-            nixpkgs = (if (local != null) then {
-              buildPlatform = local;
-            } else {}) // {
-              # TODO: does the earlier `system` arg to nixosSystem make its way here?
-              hostPlatform.system = target;
-            };
-            # nixpkgs.buildPlatform = local;  # set by instantiate.nix instead
-            # nixpkgs.config.replaceStdenv = { pkgs }: pkgs.ccacheStdenv;
-          }
-          (import ./hosts/instantiate.nix { hostName = name; })
-          self.nixosModules.default
-          self.nixosModules.passthru
-          {
-            nixpkgs.overlays = [
-              self.overlays.passthru
-              self.overlays.sane-all
-            ];
-          }
-        ];
-      };
-    in {
-      nixosConfigurations =
-        let
-          hosts = {
-            servo =  { name = "servo"; local = "x86_64-linux"; target = "x86_64-linux"; };
-            desko =  { name = "desko"; local = "x86_64-linux"; target = "x86_64-linux"; };
-            lappy =  { name = "lappy"; local = "x86_64-linux"; target = "x86_64-linux"; };
-            moby  =  { name = "moby";  local = "x86_64-linux"; target = "aarch64-linux"; };
-            rescue = { name = "rescue"; local = "x86_64-linux"; target = "x86_64-linux"; };
-          };
-          # cross-compiled builds: instead of emulating the host, build using a cross-compiler.
-          # - these are faster to *build* than the emulated variants (useful when tweaking packages),
-          # - but fewer of their packages can be found in upstream caches.
-          cross = mapAttrValues evalHost hosts;
-          emulated = mapAttrValues
-            ({name, local, target}: evalHost {
-              inherit name target;
-              local = null;
+      nixosSystem = import ((patchedPkgs target) + "/nixos/lib/eval-config.nix");
+    in (nixosSystem {
+      # by default the local system is the same as the target, employing emulation when they differ
+      system = target;
+      specialArgs = { inherit mobile-nixos home-manager impermanence; };
+      modules = [
+        ./modules
+        ./machines/${name}
+        (import ./helpers/set-hostname.nix name)
+        home-manager.nixosModule
+        impermanence.nixosModule
+        sops-nix.nixosModules.sops
+        {
+          nixpkgs.config.allowUnfree = true;
+          nixpkgs.overlays = [
+            (import "${mobile-nixos}/overlay/overlay.nix")
+            (import ./pkgs/overlay.nix)
+            (next: prev: rec {
+              # non-emulated packages build *from* local *for* target.
+              # for large packages like the linux kernel which are expensive to build under emulation,
+              # the config can explicitly pull such packages from `pkgs.cross` to do more efficient cross-compilation.
+              cross = (nixpkgsFor local target) // (customPackagesFor local target);
+              stable = import nixpkgs-stable { system = target; };
+              # pinned packages:
+              electrum = stable.electrum;
            })
-            hosts;
-          prefixAttrs = prefix: attrs: mapAttrs'
-            (name: value: {
-              name = prefix + name;
-              inherit value;
-            })
-            attrs;
-        in
-          (prefixAttrs "cross-" cross) //
-          (prefixAttrs "emulated-" emulated) // {
-            # prefer native builds for these machines:
-            inherit (emulated) servo desko lappy rescue;
-            # prefer cross-compiled builds for these machines:
-            inherit (cross) moby;
-          };
+          ];
+        }
+      ];
+    });

-      # unofficial output
+    decl-bootable-machine = { name, local, target }: rec {
+      nixosConfiguration = decl-machine { inherit name local target; };
      # this produces a EFI-bootable .img file (GPT with a /boot partition and a system (/ or /nix) partition).
      # after building this:
      #   - flash it to a bootable medium (SD card, flash drive, HDD)
@@ -183,308 +78,24 @@
      #   - boot
      #   - if fs wasn't resized automatically, then `sudo btrfs filesystem resize max /`
      #   - checkout this flake into /etc/nixos AND UPDATE THE FS UUIDS.
-      #   - `nixos-rebuild --flake './#<host>' switch`
-      imgs = mapAttrValues (host: host.config.system.build.img) self.nixosConfigurations;
-
-      # unofficial output
-      hostPkgs = mapAttrValues (host: host.config.system.build.pkgs) self.nixosConfigurations;
-      hostPrograms = mapAttrValues (host: mapAttrValues (p: p.package) host.config.sane.programs) self.nixosConfigurations;
-
-      overlays = {
-        # N.B.: `nix flake check` requires every overlay to take `final: prev:` at defn site,
-        #   hence the weird redundancy.
-        default = final: prev: self.overlays.pkgs final prev;
-        sane-all = final: prev: import ./overlays/all.nix final prev;
-        disable-flakey-tests = final: prev: import ./overlays/disable-flakey-tests.nix final prev;
-        pkgs = final: prev: import ./overlays/pkgs.nix final prev;
-        pins = final: prev: import ./overlays/pins.nix final prev;
-        preferences = final: prev: import ./overlays/preferences.nix final prev;
-        optimizations = final: prev: import ./overlays/optimizations.nix final prev;
-        passthru = final: prev:
-          let
-            mobile = (import "${mobile-nixos}/overlay/overlay.nix");
-            uninsane = uninsane-dot-org.overlay;
-          in
-            (mobile final prev)
-            // (uninsane final prev)
-          ;
-      };
-
-      nixosModules = rec {
-        default = sane;
-        sane = import ./modules;
-        passthru = { ... }: {
-          imports = [
-            sops-nix.nixosModules.sops
-          ];
-        };
-      };
-
-      # this includes both our native packages and all the nixpkgs packages.
-      legacyPackages =
-        let
-          allPkgsFor = sys: (nixpkgsCompiledBy sys).appendOverlays [
-            self.overlays.passthru self.overlays.pkgs
-          ];
-        in {
-          x86_64-linux = allPkgsFor "x86_64-linux";
-          aarch64-linux = allPkgsFor "aarch64-linux";
-        };
-
-      # extract only our own packages from the full set.
-      # because of `nix flake check`, we flatten the package set and only surface x86_64-linux packages.
-      packages = mapAttrs
-        (system: allPkgs:
-          allPkgs.lib.filterAttrs (name: pkg:
-            # keep only packages which will pass `nix flake check`, i.e. keep only:
-            # - derivations (not package sets)
-            # - packages that build for the given platform
-            (! elem name [ "feeds" "pythonPackagesExtensions" ])
-            && (allPkgs.lib.meta.availableOn allPkgs.stdenv.hostPlatform pkg)
-          )
-          (
-            # expose sane packages and chosen inputs (uninsane.org)
-            (import ./pkgs { pkgs = allPkgs; }) // {
-              inherit (allPkgs) uninsane-dot-org;
-            }
-          )
-        )
-        # self.legacyPackages;
-        { inherit (self.legacyPackages) x86_64-linux; }
-      ;
-
-      apps."x86_64-linux" =
-        let
-          pkgs = self.legacyPackages."x86_64-linux";
-          sanePkgs = import ./pkgs { inherit pkgs; };
-          deployScript = host: addr: action: pkgs.writeShellScript "deploy-${host}" ''
-            nix build '.#nixosConfigurations.${host}.config.system.build.toplevel' --out-link ./result-${host} $@
-            sudo nix sign-paths -r -k /run/secrets/nix_serve_privkey $(readlink ./result-${host})
-
-            # XXX: this triggers another config eval & (potentially) build.
-            # if the config changed between these invocations, the above signatures might not apply to the deployed config.
-            # let the user handle that edge case by re-running this whole command
-            nixos-rebuild --flake '.#${host}' ${action} --target-host colin@${addr} --use-remote-sudo $@
-          '';
-
-          # pkg updating.
-          # a cleaner alternative lives here: <https://discourse.nixos.org/t/how-can-i-run-the-updatescript-of-personal-packages/25274/2>
-          mkUpdater = attrPath: {
-            type = "app";
-            program = let
-              pkg = pkgs.lib.getAttrFromPath attrPath sanePkgs;
-              strAttrPath = pkgs.lib.concatStringsSep "." attrPath;
-              commandArgv = pkg.updateScript.command or pkg.updateScript;
-              command = pkgs.lib.escapeShellArgs commandArgv;
-            in builtins.toString (pkgs.writeShellScript "update-${strAttrPath}" ''
-              export UPDATE_NIX_NAME=${pkg.name}
-              export UPDATE_NIX_PNAME=${pkg.pname}
-              export UPDATE_NIX_OLD_VERSION=${pkg.version}
-              export UPDATE_NIX_ATTR_PATH=${strAttrPath}
-              ${command}
-            '');
-          };
-          mkUpdatersNoAliases = opts: basePath: pkgs.lib.concatMapAttrs
-            (name: pkg:
-              if pkg.recurseForDerivations or false then {
-                "${name}" = mkUpdaters opts (basePath ++ [ name ]);
-              } else if pkg.updateScript or null != null then {
-                "${name}" = mkUpdater (basePath ++ [ name ]);
-              } else {}
-            )
-            (pkgs.lib.getAttrFromPath basePath sanePkgs);
-          mkUpdaters = { ignore ? [] }@opts: basePath:
-            let
-              updaters = mkUpdatersNoAliases opts basePath;
-              invokeUpdater = name: pkg:
-                let
-                  fullPath = basePath ++ [ name ];
-                  doUpdateByDefault = !builtins.elem fullPath ignore;
-
-                  # in case `name` has a `.` in it, we have to quote it
-                  escapedPath = builtins.map (p: ''"${p}"'') fullPath;
-                  updatePath = builtins.concatStringsSep "." ([ "update" "pkgs" ] ++ escapedPath);
-                in pkgs.lib.optionalString doUpdateByDefault (
-                  pkgs.lib.escapeShellArgs [
-                    "nix" "run" ".#${updatePath}"
-                  ]
-                );
-            in {
-              type = "app";
-              program = builtins.toString (pkgs.writeShellScript
-                (builtins.concatStringsSep "-" (["update"] ++ basePath))
-                (builtins.concatStringsSep
-                  "\n"
-                  (pkgs.lib.mapAttrsToList invokeUpdater updaters)
-                )
-              );
-            } // updaters;
-        in {
-          help = {
-            type = "app";
-            program = let
-              helpMsg = builtins.toFile "nixos-config-help-message" ''
-                commands:
-                - `nix run '.#help'`
-                  - show this message
-                - `nix run '.#update.pkgs'`
-                  - updates every package
-                - `nix run '.#update.feeds'`
-                  - updates metadata for all feeds
-                - `nix run '.#init-feed' <url>`
-                - `nix run '.#deploy-{lappy,moby,moby-test,servo}' [nixos-rebuild args ...]`
-                - `nix run '.#check'`
-                  - make sure all systems build; NUR evaluates
-
-                specific build targets of interest:
-                - `nix build '.#imgs.rescue'`
-              '';
-            in builtins.toString (pkgs.writeShellScript "nixos-config-help" ''
-              cat ${helpMsg}
-              echo ""
-              echo "complete flake structure:"
-              nix flake show --option allow-import-from-derivation true
-            '');
-          };
-          update.pkgs = mkUpdaters { ignore = [ ["feeds"] ]; } [];
-          update.feeds = mkUpdaters {} [ "feeds" ];
-
-          init-feed = {
-            type = "app";
-            program = "${pkgs.feeds.init-feed}";
-          };
-
-          deploy-lappy = {
-            type = "app";
-            program = ''${deployScript "lappy" "lappy" "switch"}'';
-          };
-          deploy-moby-test = {
-            type = "app";
-            program = ''${deployScript "moby" "moby-hn" "test"}'';
-          };
-          deploy-moby = {
-            type = "app";
-            program = ''${deployScript "moby" "moby-hn" "switch"}'';
-          };
-          deploy-servo = {
-            type = "app";
-            program = ''${deployScript "servo" "servo" "switch"}'';
-          };
-
-          sync-moby = {
-            # copy music from the current device to moby
-            # TODO: should i actually sync from /mnt/servo-media/Music instead of the local drive?
-            type = "app";
-            program = builtins.toString (pkgs.writeShellScript "sync-to-moby" ''
-              sudo mount /mnt/moby-home
-              ${pkgs.sane-scripts.sync-music}/bin/sane-sync-music ~/Music /mnt/moby-home/Music
-            '');
-          };
-
-          sync-lappy = {
-            # copy music from servo to lappy
-            # can run this from any device that has ssh access to lappy
-            type = "app";
-            program = builtins.toString (pkgs.writeShellScript "sync-to-lappy" ''
-              sudo mount /mnt/lappy-home
-              ${pkgs.sane-scripts.sync-music}/bin/sane-sync-music /mnt/servo-media/Music /mnt/lappy-home/Music
-            '');
-          };
-
-          check = {
-            type = "app";
-            program = builtins.toString (pkgs.writeShellScript "check-all" ''
-              nix run '.#check.nur'
-              RC0=$?
-              nix run '.#check.host-configs'
-              RC1=$?
-              nix run '.#check.rescue'
-              RC2=$?
-              echo "nur: $RC0"
-              echo "host-configs: $RC1"
-              echo "rescue: $RC2"
-              exit $(($RC0 | $RC1 | $RC2))
-            '');
-          };
-
-          check.nur = {
-            # `nix run '.#check-nur'`
-            # validates that my repo can be included in the Nix User Repository
-            type = "app";
-            program = builtins.toString (pkgs.writeShellScript "check-nur" ''
-              cd ${./.}/integrations/nur
-              NIX_PATH= NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-env -f . -qa \* --meta --xml \
-                --allowed-uris https://static.rust-lang.org \
-                --option restrict-eval true \
-                --option allow-import-from-derivation true \
-                --drv-path --show-trace \
-                -I nixpkgs=$(nix-instantiate --find-file nixpkgs) \
-                -I ../../ \
-                | tee  # tee to prevent interactive mode
-            '');
-          };
-
-          check.host-configs = {
-            type = "app";
-            program = let
-              checkHost = host: ''
-                nix build -v '.#nixosConfigurations.${host}.config.system.build.toplevel' --out-link ./result-${host} -j2 $@
-                RC_${host}=$?
-              '';
-            in builtins.toString (pkgs.writeShellScript
-              "check-host-configs"
-              ''
-                ${checkHost "desko"}
-                ${checkHost "lappy"}
-                ${checkHost "servo"}
-                ${checkHost "moby"}
-                ${checkHost "rescue"}
-                echo "desko: $RC_desko"
-                echo "lappy: $RC_lappy"
-                echo "servo: $RC_servo"
-                echo "moby: $RC_moby"
-                echo "rescue: $RC_rescue"
-                exit $(($RC_desko | $RC_lappy | $RC_servo | $RC_moby | $RC_rescue))
-              ''
-            );
-          };
-
-          check.rescue = {
-            type = "app";
-            program = builtins.toString (pkgs.writeShellScript "check-rescue" ''
-              nix build -v '.#imgs.rescue' --out-link ./result-rescue-img -j2
-            '');
-          };
-        };
-
-      templates = {
-        env.python-data = {
-          # initialize with:
-          # - `nix flake init -t '/home/colin/dev/nixos/#env.python-data'`
-          # then enter with:
-          # - `nix develop`
-          path = ./templates/env/python-data;
-          description = "python environment for data processing";
-        };
-        pkgs.rust-inline = {
-          # initialize with:
-          # - `nix flake init -t '/home/colin/dev/nixos/#pkgs.rust-inline'`
-          path = ./templates/pkgs/rust-inline;
-          description = "rust package and development environment (inline rust sources)";
-        };
-        pkgs.rust = {
-          # initialize with:
-          # - `nix flake init -t '/home/colin/dev/nixos/#pkgs.rust'`
-          path = ./templates/pkgs/rust;
-          description = "rust package fit to ship in nixpkgs";
-        };
-        pkgs.make = {
-          # initialize with:
-          # - `nix flake init -t '/home/colin/dev/nixos/#pkgs.make'`
-          path = ./templates/pkgs/make;
-          description = "default Makefile-based derivation";
-        };
-      };
+      #   - `nixos-rebuild --flake './#<machine>' switch`
+      img = nixosConfiguration.config.system.build.img;
    };
+    machines.servo = decl-bootable-machine { name = "servo"; local = "aarch64-linux"; target = "aarch64-linux"; };
+    machines.desko = decl-bootable-machine { name = "desko"; local = "x86_64-linux"; target = "x86_64-linux"; };
+    machines.lappy = decl-bootable-machine { name = "lappy"; local = "x86_64-linux"; target = "x86_64-linux"; };
+    machines.moby = decl-bootable-machine { name = "moby"; local = "aarch64-linux"; target = "aarch64-linux"; };
+    # special cross-compiled variant, to speed up deploys from an x86 box to the arm target
+    # note that these *do* produce different store paths, because the closure for the tools used to cross compile
+    # v.s. emulate differ.
+    # so deploying moby-cross and then moby incurs some rebuilding.
+    machines.moby-cross = decl-bootable-machine { name = "moby"; local = "x86_64-linux"; target = "aarch64-linux"; };
+    machines.rescue = decl-bootable-machine { name = "rescue"; local = "x86_64-linux"; target = "x86_64-linux"; };
+  in {
+    nixosConfigurations = builtins.mapAttrs (name: value: value.nixosConfiguration) machines;
+    imgs = builtins.mapAttrs (name: value: value.img) machines;
+    packages.x86_64-linux = customPackagesFor "x86_64-linux" "x86_64-linux";
+    packages.aarch64-linux = customPackagesFor "aarch64-linux" "aarch64-linux";
+  };
 }

--- a/helpers/set-hostname.nix
+++ b/helpers/set-hostname.nix
@@ -0,0 +1,4 @@
+hostName: { ... }:
+{
+  networking.hostName = hostName;
+}
--- a/hosts/README.md
+++ b/hosts/README.md
@@ -1,7 +0,0 @@
-## directory structure
- by-name/<hostname>: configuration which is evaluated _only_ for the given hostname
- common/: configuration which applies to all hosts
- modules/: nixpkgs-style modules which may be used by multiple hosts, but configured separately per host.
-    - ideally no module here has effect unless `enable`d
-        - however, `enable` may default to true
-        - and in practice some of these modules surely aren't fully "disableable"
--- a/hosts/by-name/desko/default.nix
+++ b/hosts/by-name/desko/default.nix
@@ -1,55 +0,0 @@
-{ config, pkgs, ... }:
-{
-  imports = [
-    ./fs.nix
-  ];
-
-  # sane.guest.enable = true;
-
-  # services.distccd.enable = true;
-  # sane.programs.distcc.enableFor.user.guest = true;
-
-  sops.secrets.colin-passwd.neededForUsers = true;
-
-  sane.roles.build-machine.enable = true;
-  sane.roles.ac = true;
-  sane.roles.client = true;
-  sane.roles.dev-machine = true;
-  sane.services.wg-home.enable = true;
-  sane.services.wg-home.ip = config.sane.hosts.by-name."desko".wg-home.ip;
-  sane.services.duplicity.enable = true;
-  sane.services.nixserve.secretKeyFile = config.sops.secrets.nix_serve_privkey.path;
-
-  sane.gui.sway.enable = true;
-  sane.programs.iphoneUtils.enableFor.user.colin = true;
-  sane.programs.steam.enableFor.user.colin = true;
-
-  sane.programs.guiApps.suggestedPrograms = [ "desktopGuiApps" ];
-  sane.programs.consoleUtils.suggestedPrograms = [ "consoleMediaUtils" "desktopConsoleUtils" ];
-  # sane.programs.devPkgs.enableFor.user.colin = true;
-
-  boot.loader.efi.canTouchEfiVariables = false;
-  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
-
-  # needed to use libimobiledevice/ifuse, for iphone sync
-  services.usbmuxd.enable = true;
-
-  # don't enable wifi by default: it messes with connectivity.
-  systemd.services.iwd.enable = false;
-  systemd.services.wpa_supplicant.enable = false;
-
-  # default config: https://man.archlinux.org/man/snapper-configs.5
-  # defaults to something like:
-  #   - hourly snapshots
-  #   - auto cleanup; keep the last 10 hourlies, last 10 daylies, last 10 monthlys.
-  services.snapper.configs.nix = {
-    # TODO: for the impermanent setup, we'd prefer to just do /nix/persist,
-    # but that also requires setting up the persist dir as a subvol
-    SUBVOLUME = "/nix";
-    # TODO: ALLOW_USERS doesn't seem to work. still need `sudo snapper -c nix list`
-    ALLOW_USERS = [ "colin" ];
-  };
-
-  # docs: https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion
-  system.stateVersion = "21.05";
-}
--- a/hosts/by-name/lappy/polyfill.nix
+++ b/hosts/by-name/lappy/polyfill.nix
@@ -1,43 +0,0 @@
-# doesn't actually *enable* anything,
-# but sets up any modules such that if they *were* enabled, they'll act as expected.
-{ pkgs, ... }:
-{
-  sane.gui.sxmo = {
-    greeter = "greetd-sway-gtkgreet";
-    noidle = true;  #< power button requires 1s hold, which makes it impractical to be dealing with.
-    settings = {
-      # XXX: make sure the user is part of the `input` group!
-      SXMO_LISGD_INPUT_DEVICE = "/dev/input/by-id/usb-Wacom_Co._Ltd._Pen_and_multitouch_sensor-event-if00";
-      # these identifiers are from `swaymsg -t get_inputs`
-      SXMO_VOLUME_BUTTON = "1:1:AT_Translated_Set_2_keyboard";
-      # SXMO_VOLUME_BUTTON = "none";
-      # N.B.: thinkpad's power button requires a full second press to do anything
-      SXMO_POWER_BUTTON = "0:1:Power_Button";
-      # SXMO_POWER_BUTTON = "none";
-      SXMO_DISABLE_LEDS = "1";
-      SXMO_UNLOCK_IDLE_TIME = "120";  # default
-      # sxmo tries to determine device type from /proc/device-tree/compatible,
-      # but that doesn't seem to exist on NixOS?  (or maybe it just doesn't exist
-      # on non-aarch64 builds).
-      # the device type informs (at least):
-      # - SXMO_WIFI_MODULE
-      # - SXMO_RTW_SCAN_INTERVAL
-      # - SXMO_SYS_FILES
-      # - SXMO_TOUCHSCREEN_ID
-      # - SXMO_MONITOR
-      # - SXMO_ALSA_CONTROL_NAME
-      # - SXMO_SWAY_SCALE
-      # see <repo:mil/sxmo-utils:scripts/deviceprofiles>
-      # SXMO_DEVICE_NAME = "pine64,pinephone-1.2";
-      # if sxmo doesn't know the device, it can't decide whether to use one_button or three_button mode
-      #   and so it just wouldn't handle any button inputs (sxmo_hook_inputhandler.sh not on path)
-      SXMO_DEVICE_NAME = "three_button_touchscreen";
-    };
-    package = (pkgs.sxmo-utils-latest.override { preferSystemd = true; }).overrideAttrs (base: {
-      postPatch = (base.postPatch or "") + ''
-        # after volume-button navigation mode, restore full keyboard functionality
-        cp ${./xkb_mobile_normal_buttons} ./configs/xkb/xkb_mobile_normal_buttons
-      '';
-    });
-  };
-}
--- a/hosts/by-name/lappy/xkb_mobile_normal_buttons
+++ b/hosts/by-name/lappy/xkb_mobile_normal_buttons
@@ -1,7 +0,0 @@
-xkb_keymap {
-	xkb_keycodes  { include "evdev+aliases(qwerty)"	};
-	xkb_types     { include "complete"	};
-	xkb_compat    { include "complete"	};
-	xkb_symbols   { include "pc+us+inet(evdev)"	};
-	xkb_geometry  { include "pc(pc105)"	};
-};
--- a/hosts/by-name/moby/default.nix
+++ b/hosts/by-name/moby/default.nix
@@ -1,174 +0,0 @@
-# Pinephone
-# other setups to reference:
-# - <https://hamblingreen.gitlab.io/2022/03/02/my-pinephone-setup.html>
-#   - sxmo Arch user. lots of app recommendations
-#
-# wikis, resources, ...:
-# - Linux Phone Apps: <https://linuxphoneapps.org/>
-#   - massive mobile-friendly app database
-# - Mobian wiki: <https://wiki.mobian-project.org/doku.php?id=start>
-#   - recommended apps, chatrooms
-
-{ config, pkgs, lib, ... }:
-{
-  imports = [
-    ./bootloader.nix
-    ./fs.nix
-    ./gps.nix
-    ./kernel.nix
-    ./polyfill.nix
-  ];
-
-  sane.roles.client = true;
-  sane.zsh.showDeadlines = false;  # unlikely to act on them when in shell
-  sane.services.wg-home.enable = true;
-  sane.services.wg-home.ip = config.sane.hosts.by-name."moby".wg-home.ip;
-
-  # XXX colin: phosh doesn't work well with passwordless login,
-  # so set this more reliable default password should anything go wrong
-  users.users.colin.initialPassword = "147147";
-  services.getty.autologinUser = "root";  # allows for emergency maintenance?
-
-  sops.secrets.colin-passwd.neededForUsers = true;
-
-  sane.gui.sxmo.enable = true;
-  sane.programs.guiApps.suggestedPrograms = [ "handheldGuiApps" ];
-  # sane.programs.consoleUtils.enableFor.user.colin = false;
-  # sane.programs.guiApps.enableFor.user.colin = false;
-  sane.programs.blueberry.enableFor.user.colin = false;  # bluetooth manager: doesn't cross compile!
-  sane.programs.mercurial.enableFor.user.colin = false;  # does not cross compile
-  sane.programs.sequoia.enableFor.user.colin = false;
-  sane.programs.tuiApps.enableFor.user.colin = false;  # visidata, others, don't compile well
-  # disabled for faster deploys
-  sane.programs.soundconverter.enableFor.user.colin = false;
-
-  # enabled for easier debugging
-  sane.programs.eg25-control.enableFor.user.colin = true;
-  sane.programs.rtl8723cs-wowlan.enableFor.user.colin = true;
-
-  # sane.programs.ntfy-sh.config.autostart = true;
-  sane.programs.dino.config.autostart = true;
-  # sane.programs.calls.config.autostart = true;
-  sane.programs.mpv.config.vo = "wlshm";  #< see hosts/common/programs/mpv.nix for details
-
-  sane.programs.firefox.mime.priority = 300;  # prefer other browsers when possible
-  # HACK/TODO: make `programs.P.env.VAR` behave according to `mime.priority`
-  sane.programs.firefox.env = lib.mkForce {};
-  sane.programs.epiphany.env.BROWSER = "epiphany";
-  sane.programs.firefox.enableFor.user.colin = false;  # use epiphany instead
-
-  # note the .conf.d approach: using ~/.config/pipewire/pipewire.conf directly breaks all audio,
-  # presumably because that deletes the defaults entirely whereas the .conf.d approach selectively overrides defaults
-  sane.user.fs.".config/pipewire/pipewire.conf.d/10-fix-dino-mic-cutout.conf".symlink.text = ''
-    # config docs: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#properties>
-    # useful to run `pw-top` to see that these settings are actually having effect,
-    # and `pw-metadata` to see if any settings conflict (e.g. max-quantum < min-quantum)
-    #
-    # restart pipewire after editing these files:
-    # - `systemctl --user restart pipewire`
-    # - pipewire users will likely stop outputting audio until they are also restarted
-    #
-    # there's seemingly two buffers for the mic (see: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/FAQ#pipewire-buffering-explained>)
-    # 1. Pipewire buffering out of the driver and into its own member.
-    # 2. Pipewire buffering into Dino.
-    # the latter is fixed at 10ms by Dino, difficult to override via runtime config.
-    # the former defaults low (e.g. 512 samples)
-    # this default configuration causes the mic to regularly drop out entirely for a couple seconds at a time during a call,
-    # presumably because the system can't keep up (pw-top shows incrementing counter in ERR column).
-    # `pw-metadata -n settings 0 clock.force-quantum 1024` reduces to about 1 error per second.
-    # `pw-metadata -n settings 0 clock.force-quantum 2048` reduces to 1 error every < 10s.
-    # pipewire default config includes `clock.power-of-two-quantum = true`
-    context.properties = {
-      default.clock.min-quantum = 2048
-      default.clock.max-quantum = 8192
-    }
-  '';
-
-  boot.loader.efi.canTouchEfiVariables = false;
-  # /boot space is at a premium. default was 20.
-  # even 10 can be too much
-  boot.loader.generic-extlinux-compatible.configurationLimit = 8;
-  # mobile.bootloader.enable = false;
-  # mobile.boot.stage-1.enable = false;
-  # boot.initrd.systemd.enable = false;
-  # boot.initrd.services.swraid.enable = false;  # attempt to fix dm_mod stuff
-
-  # hardware.firmware makes the referenced files visible to the kernel, for whenever a driver explicitly asks for them.
-  # these files are visible from userspace by following `/sys/module/firmware_class/parameters/path`
-  #
-  # mobile-nixos' /lib/firmware includes:
-  #   rtl_bt          (bluetooth)
-  #   anx7688-fw.bin  (USB-C chip: power negotiation, HDMI/dock)
-  #   ov5640_af.bin   (camera module)
-  # hardware.firmware = [ config.mobile.device.firmware ];
-  # hardware.firmware = [ pkgs.rtl8723cs-firmware ];
-  hardware.firmware = [
-    (pkgs.linux-firmware-megous.override {
-      # rtl_bt = false probably means no bluetooth connectivity.
-      # N.B.: DON'T RE-ENABLE without first confirming that wake-on-lan works during suspend (rtcwake).
-      # it seems the rtl_bt stuff ("bluetooth coexist") might make wake-on-LAN radically more flaky.
-      rtl_bt = false;
-    })
-  ];
-
-  system.stateVersion = "21.11";
-
-  # defined: https://www.freedesktop.org/software/systemd/man/machine-info.html
-  # XXX colin: not sure which, if any, software makes use of this
-  environment.etc."machine-info".text = ''
-    CHASSIS="handset"
-  '';
-
-  # enable rotation sensor
-  hardware.sensor.iio.enable = true;
-
-  # inject specialized alsa configs via the environment.
-  # specifically, this gets the pinephone headphones & internal earpiece working.
-  # see pkgs/patched/alsa-ucm-conf for more info.
-  environment.variables.ALSA_CONFIG_UCM2 = "/run/current-system/sw/share/alsa/ucm2";
-  environment.pathsToLink = [ "/share/alsa/ucm2" ];
-  environment.systemPackages = [
-    (pkgs.alsa-ucm-conf-sane.override {
-      # internal speaker has a tendency to break :(
-      preferEarpiece = true;
-    })
-  ];
-  systemd = let
-    ucm-env = config.environment.variables.ALSA_CONFIG_UCM2;
-  in {
-    # cribbed from <repo:nixos/mobile-nixos:modules/quirks/audio.nix>
-
-    # pipewire
-    user.services.pipewire.environment.ALSA_CONFIG_UCM2       = ucm-env;
-    user.services.pipewire-pulse.environment.ALSA_CONFIG_UCM2 = ucm-env;
-    user.services.wireplumber.environment.ALSA_CONFIG_UCM2    = ucm-env;
-    services.pipewire.environment.ALSA_CONFIG_UCM2            = ucm-env;
-    services.pipewire-pulse.environment.ALSA_CONFIG_UCM2      = ucm-env;
-    services.wireplumber.environment.ALSA_CONFIG_UCM2         = ucm-env;
-
-    # pulseaudio
-    # user.services.pulseaudio.environment.ALSA_CONFIG_UCM2 = ucm-env;
-    # services.pulseaudio.environment.ALSA_CONFIG_UCM2      = ucm-env;
-
-
-    # TODO: move elsewhere...
-    services.ModemManager.serviceConfig = {
-      # N.B.: the extra "" in ExecStart serves to force upstream ExecStart to be ignored
-      ExecStart = [ "" "${pkgs.modemmanager}/bin/ModemManager --debug" ];
-      # --debug sets DEBUG level logging: so reset
-      ExecStartPost = [ "${pkgs.modemmanager}/bin/mmcli --set-logging=INFO" ];
-    };
-  };
-
-  services.udev.extraRules = let
-    chmod = "${pkgs.coreutils}/bin/chmod";
-    chown = "${pkgs.coreutils}/bin/chown";
-  in ''
-    # make Pinephone flashlight writable by user.
-    # taken from postmarketOS: <repo:postmarketOS/pmaports:device/main/device-pine64-pinephone/60-flashlight.rules>
-    SUBSYSTEM=="leds", DEVPATH=="*/*:flash", RUN+="${chmod} g+w /sys%p/brightness /sys%p/flash_strobe", RUN+="${chown} :video /sys%p/brightness /sys%p/flash_strobe"
-
-    # make Pinephone front LEDs writable by user.
-    SUBSYSTEM=="leds", DEVPATH=="*/*:indicator", RUN+="${chmod} g+w /sys%p/brightness", RUN+="${chown} :video /sys%p/brightness"
-  '';
-}
--- a/hosts/by-name/moby/gps.nix
+++ b/hosts/by-name/moby/gps.nix
@@ -1,69 +0,0 @@
-# pinephone GPS happens in EG25 modem
-# serial control interface to modem is /dev/ttyUSB2
-# after enabling GPS, readout is /dev/ttyUSB1
-#
-# minimal process to enable modem and GPS:
-# - `echo 1 > /sys/class/modem-power/modem-power/device/powered`
-# - `screen /dev/ttyUSB2 115200`
-#   - `AT+QGPSCFG="nmeasrc",1`
-#   - `AT+QGPS=1`
-# this process is automated by my `eg25-control` program and services (`eg25-control-powered`, `eg25-control-gps`)
-# - see the `modules/` directory further up this repository.
-#
-# now, something like `gpsd` can directly read from /dev/ttyUSB1,
-# or geoclue can query the GPS directly through modem-manager
-#
-# initial GPS fix can take 15+ minutes.
-# meanwhile, services like eg25-manager or eg25-control-freshen-agps can speed this up by uploading assisted GPS data to the modem.
-#
-# support/help:
-# - geoclue, gnome-maps
-#   - irc: #gnome-maps on irc.gimp.org
-#   - Matrix: #gnome-maps:gnome.org  (unclear if bridged to IRC)
-#
-# programs to pair this with:
-# - `satellite-gtk`: <https://codeberg.org/tpikonen/satellite>
-#   - shows/tracks which satellites the GPS is connected to; useful to understand fix characteristics
-# - `gnome-maps`: uses geoclue, has route planning
-# - `mepo`: uses gpsd, minimalist, flaky, and buttons are kinda hard to activate on mobile
-# - puremaps?
-# - osmin?
-#
-# known/outstanding bugs:
-# - `systemctl start eg25-control-gps` can the hang the whole system (2023/10/06)
-#   - i think it's actually `eg25-control-powered` which does this (started by the gps)
-#   - best guess is modem draws so much power at launch that other parts of the system see undervoltage
-#   - workaround is to hard power-cycle the system. the modem may not bring up after reboot: leave unpowered for 60s and boot again.
-#
-# future work:
-# - integrate with [wigle](https://www.wigle.net/) for offline equivalent to Mozilla Location Services
-
-{ config, lib, ... }:
-{
-  # test gpsd with `gpspipe -w -n 10 2> /dev/null | grep -m 1 TPV | jq '.lat, .lon' | tr '\n' ' '`
-  # ^ should return <lat> <long>
-  services.gpsd.enable = true;
-  services.gpsd.devices = [ "/dev/ttyUSB1" ];
-
-  # test geoclue2 by building `geoclue2-with-demo-agent`
-  # and running "${geoclue2-with-demo-agent}/libexec/geoclue-2.0/demos/where-am-i"
-  # note that geoclue is dbus-activated, and auto-stops after 60s with no caller
-  services.geoclue2.enable = true;
-  services.geoclue2.appConfig.where-am-i = {
-    # this is the default "agent", shipped by geoclue package: allow it to use location
-    isAllowed = true;
-    isSystem = false;
-    # XXX: setting users != [] might be causing `where-am-i` to time out
-    users = [
-      # restrict to only one set of users. empty array (default) means "allow any user to access geolocation".
-      (builtins.toString config.users.users.colin.uid)
-    ];
-  };
-  systemd.services.geoclue.after = lib.mkForce [];  #< defaults to network-online, but not all my sources require network
-  users.users.geoclue.extraGroups = [
-    "dialout"  # TODO: figure out if dialout is required. that's for /dev/ttyUSB1, but geoclue probably doesn't read that?
-  ];
-
-  sane.services.eg25-control.enable = true;
-  sane.programs.where-am-i.enableFor.user.colin = true;
-}
--- a/hosts/by-name/moby/kernel.nix
+++ b/hosts/by-name/moby/kernel.nix
@@ -1,89 +0,0 @@
-{ pkgs, ... }:
-let
-  dmesg = "${pkgs.util-linux}/bin/dmesg";
-  grep = "${pkgs.gnugrep}/bin/grep";
-  modprobe = "${pkgs.kmod}/bin/modprobe";
-  ensureHWReady = ''
-    # common boot failure:
-    # blank screen (no backlight even), with the following log:
-    # ```syslog
-    # sun8i-dw-hdmi 1ee0000.hdmi: Couldn't get the HDMI PHY
-    # ...
-    # sun4i-drm display-engine: Couldn't bind all pipelines components
-    # ...
-    # sun8i-dw-hdmi: probe of 1ee0000.hdmi failed with error -17
-    # ```
-    #
-    # in particular, that `probe ... failed` occurs *only* on failed boots
-    # (the other messages might sometimes occur even on successful runs?)
-    #
-    # reloading the sun8i hdmi driver usually gets the screen on, showing boot text.
-    # then restarting display-manager.service gets us to the login.
-    #
-    # NB: the above log is default level. though less specific, there's a `err` level message that also signals this:
-    # sun4i-drm display-engine: failed to bind 1ee0000.hdmi (ops sun8i_dw_hdmi_ops [sun8i_drm_hdmi]): -17
-    # NB: this is the most common, but not the only, failure mode for `display-manager`.
-    # another error seems characterized by these dmesg logs, in which reprobing sun8i_drm_hdmi does not fix:
-    # ```syslog
-    # sun6i-mipi-dsi 1ca0000.dsi: Couldn't get the MIPI D-PHY
-    # sun4i-drm display-engine: Couldn't bind all pipelines components
-    # sun6i-mipi-dsi 1ca0000.dsi: Couldn't register our component
-    # ```
-
-    if (${dmesg} --kernel --level err --color=never --notime | ${grep} -q 'sun4i-drm display-engine: failed to bind 1ee0000.hdmi')
-    then
-      echo "reprobing sun8i_drm_hdmi"
-      # if a command here fails it errors the whole service, so prefer to log instead
-      ${modprobe} -r sun8i_drm_hdmi || echo "failed to unload sun8i_drm_hdmi"
-      ${modprobe} sun8i_drm_hdmi || echo "failed to load sub8i_drm_hdmi"
-    fi
-  '';
-in
-{
-  boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux-megous;
-  # boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux-manjaro;
-  # boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_latest;
-
-  # alternatively, apply patches directly to stock nixos kernel:
-  # boot.kernelPatches = manjaroPatches ++ [
-  #   (patchDefconfig kernelConfig)
-  # ];
-
-  # configure nixos to build a compressed kernel image, since it doesn't usually do that for aarch64 target.
-  # without this i run out of /boot space in < 10 generations
-  nixpkgs.hostPlatform.linux-kernel = {
-    # defaults:
-    name = "aarch64-multiplatform";
-    baseConfig = "defconfig";
-    DTB = true;
-    autoModules = true;
-    preferBuiltin = true;
-    # extraConfig = ...
-    # ^-- raspberry pi stuff: we don't need it.
-
-    # target = "Image";  # <-- default
-    target = "Image.gz";  # <-- compress the kernel image
-    # target = "zImage";  # <-- confuses other parts of nixos :-(
-  };
-
-  # disable proximity sensor.
-  # the filtering/calibration is bad that it causes the screen to go fully dark at times.
-  boot.blacklistedKernelModules = [ "stk3310" ];
-
-  boot.kernelParams = [
-    # without this some GUI apps fail: `DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory`
-    # this is because they can't allocate enough video ram.
-    # see related nixpkgs issue: <https://github.com/NixOS/nixpkgs/issues/260222>
-    #
-    # the default CMA seems to be 32M.
-    # i was running fine with 256MB from 2022/07-ish through 2022/12-ish, but then the phone quit reliably coming back from sleep (phosh): maybe a memory leak?
-    # `cat /proc/meminfo` to see CmaTotal/CmaFree if interested in tuning this.
-    "cma=512M"
-    # 2023/10/20: potential fix for the lima (GPU) timeout bugs:
-    # - <https://gitlab.com/postmarketOS/pmaports/-/issues/805#note_890467824>
-    "lima.sched_timeout_ms=2000"
-  ];
-
-  services.xserver.displayManager.job.preStart = ensureHWReady;
-  systemd.services.greetd.preStart = ensureHWReady;
-}
--- a/hosts/by-name/moby/polyfill.nix
+++ b/hosts/by-name/moby/polyfill.nix
@@ -1,96 +0,0 @@
-# this file configures preferences per program, without actually enabling any programs.
-# the goal is to separate the place where we decide *what* to use (i.e. `sane.programs.firefox.enable = true` -- at the toplevel)
-# from where we specific how that thing should behave *if* it's in use.
-#
-# NixOS backgrounds:
-# - <https://github.com/NixOS/nixos-artwork>
-#   - <https://github.com/NixOS/nixos-artwork/issues/50>  (colorful; unmerged)
-#   - <https://github.com/NixOS/nixos-artwork/pull/60/files>  (desktop-oriented; clean; unmerged)
-# - <https://itsfoss.com/content/images/2023/04/nixos-tutorials.png>
-
-{ lib, pkgs, sane-lib, ... }:
-{
-  sane.programs.firefox.config = {
-    # compromise impermanence for the sake of usability
-    persistCache = "private";
-    persistData = "private";
-
-    # i don't do crypto stuff on moby
-    addons.ether-metamask.enable = false;
-    # sidebery UX doesn't make sense on small screen
-    addons.sidebery.enable = false;
-  };
-  sane.programs.swaynotificationcenter.config = {
-    backlight = "backlight";  # /sys/class/backlight/*backlight*/brightness
-  };
-
-  sane.gui.sxmo = {
-    nogesture = true;
-    settings = {
-      ### hardware: touch screen
-      SXMO_LISGD_INPUT_DEVICE = "/dev/input/by-path/platform-1c2ac00.i2c-event";
-      # vol and power are detected correctly by upstream
-
-      ### preferences
-      DEFAULT_COUNTRY = "US";
-
-      SXMO_AUTOROTATE = "1";  # enable auto-rotation at launch. has no meaning in stock/upstream sxmo-utils
-
-      # BEMENU lines (wayland DMENU):
-      # - camera is 9th entry
-      # - flashlight is 10th entry
-      # - config is 14th entry. inside that:
-      #   - autorotate is 11th entry
-      #   - system menu is 19th entry
-      #   - close is 20th entry
-      # - power is 15th entry
-      # - close is 16th entry
-      SXMO_BEMENU_LANDSCAPE_LINES = "11";  # default 8
-      SXMO_BEMENU_PORTRAIT_LINES = "16";  # default 16
-      SXMO_LOCK_IDLE_TIME = "15";  # how long between screenoff -> lock -> back to screenoff (default: 8)
-      # gravity: how far to tilt the device before the screen rotates
-      # for a given setting, normal <-> invert requires more movement then left <-> right
-      # i.e. the settingd doesn't feel completely symmetric
-      # SXMO_ROTATION_GRAVITY default is 16374
-      # SXMO_ROTATION_GRAVITY = "12800";  # uncomfortably high
-      # SXMO_ROTATION_GRAVITY = "12500";    # kinda uncomfortable when walking
-      SXMO_ROTATION_GRAVITY = "12000";
-      SXMO_SCREENSHOT_DIR = "/home/colin/Pictures";  # default: "$HOME"
-
-      # sway/wayland scaling:
-      # - conflicting info out there on how scaling actually works
-      #   at the least, for things where it matters (mpv), it seems like scale settings have 0 effect on perf
-      # ways to enforce scaling:
-      # - <https://wiki.archlinux.org/title/HiDPI>
-      # - `swaymsg -- output DSI-1 scale 2.0`  (scales everything)
-      # - `dconf write /org/gnome/desktop/interface/text-scaling-factor 2.0`  (scales ONLY TEXT)
-      # - `GDK_DPI_SCALE=2.0`  (scales ONLY TEXT)
-      #
-      # application notes:
-      # - cozy: in landscape, playback position is not visible unless scale <= 1.7
-      #   - if in a tab, then scale 1.6 is the max
-      # SXMO_SWAY_SCALE = "1.5";  # hard to press gPodder icons
-      SXMO_SWAY_SCALE = "1.6";
-      # SXMO_SWAY_SCALE = "1.8";
-      # SXMO_SWAY_SCALE = "2";
-      SXMO_WORKSPACE_WRAPPING = "5";  # how many workspaces. default: 4
-
-      # wvkbd layers:
-      # - full
-      # - landscape
-      # - special  (e.g. coding symbols like ~)
-      # - emoji
-      # - nav
-      # - simple  (like landscape, but no parens/tab/etc; even fewer chars)
-      # - simplegrid  (simple, but grid layout)
-      # - dialer  (digits)
-      # - cyrillic
-      # - arabic
-      # - persian
-      # - greek
-      # - georgian
-      WVKBD_LANDSCAPE_LAYERS = "landscape,special,emoji";
-      WVKBD_LAYERS = "full,special,emoji";
-    };
-  };
-}
--- a/hosts/by-name/rescue/default.nix
+++ b/hosts/by-name/rescue/default.nix
@@ -1,18 +0,0 @@
-{ pkgs, ... }:
-{
-  imports = [
-    ./fs.nix
-  ];
-
-  boot.loader.efi.canTouchEfiVariables = false;
-  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
-  sane.persist.enable = false;
-  sane.nixcache.enable = false;  # don't want to be calling out to dead machines that we're *trying* to rescue
-
-  # auto-login at shell
-  services.getty.autologinUser = "colin";
-  # users.users.colin.initialPassword = "colin";
-
-  # docs: https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion
-  system.stateVersion = "21.05";
-}
--- a/hosts/by-name/servo/default.nix
+++ b/hosts/by-name/servo/default.nix
@@ -1,56 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  imports = [
-    ./fs.nix
-    ./net.nix
-    ./services
-  ];
-
-  sane.programs = {
-    # for administering services
-    freshrss.enableFor.user.colin = true;
-    matrix-synapse.enableFor.user.colin = true;
-    signaldctl.enableFor.user.colin = true;
-  };
-
-  sane.roles.ac = true;
-  sane.roles.build-machine.enable = true;
-  sane.roles.build-machine.emulation = false;
-  sane.zsh.showDeadlines = false;  # ~/knowledge doesn't always exist
-  sane.programs.consoleUtils.suggestedPrograms = [
-    "desktopConsoleUtils"
-    "sane-scripts.stop-all-servo"
-  ];
-  sane.services.dyn-dns.enable = true;
-  sane.services.wg-home.enable = true;
-  sane.services.wg-home.visibleToWan = true;
-  sane.services.wg-home.forwardToWan = true;
-  sane.services.wg-home.routeThroughServo = false;
-  sane.services.wg-home.ip = config.sane.hosts.by-name."servo".wg-home.ip;
-  sane.nixcache.substituters.servo = false;
-  sane.nixcache.substituters.desko = false;
-  # sane.services.duplicity.enable = true;  # TODO: re-enable after HW upgrade
-
-  # automatically log in at the virtual consoles.
-  # using root here makes sure we always have an escape hatch
-  services.getty.autologinUser = "root";
-
-  boot.loader.efi.canTouchEfiVariables = false;
-  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
-
-  # both transmission and ipfs try to set different net defaults.
-  # we just use the most aggressive of the two here:
-  boot.kernel.sysctl = {
-    "net.core.rmem_max" = 4194304;  # 4MB
-  };
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "21.11";
-}
-
--- a/hosts/by-name/servo/fs.nix
+++ b/hosts/by-name/servo/fs.nix
@@ -1,116 +0,0 @@
-{ ... }:
-
-{
-  sane.persist.root-on-tmpfs = true;
-  # increase /tmp space (defaults to 50% of RAM) for building large nix things.
-  # even the stock `nixpkgs.linux` consumes > 16 GB of tmp
-  fileSystems."/tmp".options = [ "size=32G" ];
-
-  fileSystems."/nix" = {
-    device = "/dev/disk/by-uuid/cc81cca0-3cc7-4d82-a00c-6243af3e7776";
-    fsType = "btrfs";
-    options = [
-      "compress=zstd"
-      "defaults"
-    ];
-  };
-
-  fileSystems."/boot" = {
-    device = "/dev/disk/by-uuid/6EE3-4171";
-    fsType = "vfat";
-  };
-
-  # slow, external storage (for archiving, etc)
-  fileSystems."/mnt/persist/ext" = {
-    device = "/dev/disk/by-uuid/aa272cff-0fcc-498e-a4cb-0d95fb60631b";
-    fsType = "btrfs";
-    options = [
-      "compress=zstd"
-      "defaults"
-    ];
-  };
-
-  sane.persist.stores."ext" = {
-    origin = "/mnt/persist/ext/persist";
-    storeDescription = "external HDD storage";
-  };
-  sane.fs."/mnt/persist/ext".mount = {};
-
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: this is overly broad; only need media and share directories to be persisted
-    { user = "colin"; group = "users"; path = "/var/lib/uninsane"; }
-  ];
-  # force some problematic directories to always get correct permissions:
-  sane.fs."/var/lib/uninsane/media".dir.acl = {
-    user = "colin"; group = "media"; mode = "0775";
-  };
-  sane.fs."/var/lib/uninsane/media/archive".dir = {};
-  sane.fs."/var/lib/uninsane/media/archive/README.md".file.text = ''
-    this directory is for media i wish to remove from my library,
-    but keep for a short time in case i reverse my decision.
-    treat it like a system trash can.
-  '';
-  sane.fs."/var/lib/uninsane/media/Books".dir = {};
-  sane.fs."/var/lib/uninsane/media/Books/Audiobooks".dir = {};
-  sane.fs."/var/lib/uninsane/media/Books/Books".dir = {};
-  sane.fs."/var/lib/uninsane/media/Books/Visual".dir = {};
-  sane.fs."/var/lib/uninsane/media/collections".dir = {};
-  sane.fs."/var/lib/uninsane/media/datasets".dir = {};
-  sane.fs."/var/lib/uninsane/media/freeleech".dir = {};
-  sane.fs."/var/lib/uninsane/media/Music".dir = {};
-  sane.fs."/var/lib/uninsane/media/Pictures".dir = {};
-  sane.fs."/var/lib/uninsane/media/Videos".dir = {};
-  sane.fs."/var/lib/uninsane/media/Videos/Film".dir = {};
-  sane.fs."/var/lib/uninsane/media/Videos/Shows".dir = {};
-  sane.fs."/var/lib/uninsane/media/Videos/Talks".dir = {};
-  sane.fs."/var/lib/uninsane/datasets/README.md".file.text = ''
-    this directory may seem redundant with ../media/datasets. it isn't.
-    this directory exists on SSD, allowing for speedy access to specific datasets when necessary.
-    the contents should be a subset of what's in ../media/datasets.
-  '';
-  # make sure large media is stored to the HDD
-  sane.persist.sys.ext = [
-    {
-      user = "colin";
-      group = "users";
-      mode = "0777";
-      path = "/var/lib/uninsane/media/Videos";
-    }
-    {
-      user = "colin";
-      group = "users";
-      mode = "0777";
-      path = "/var/lib/uninsane/media/freeleech";
-    }
-    {
-      user = "colin";
-      group = "users";
-      mode = "0777";
-      path = "/var/lib/uninsane/media/datasets";
-    }
-  ];
-
-  # btrfs doesn't easily support swapfiles
-  # swapDevices = [
-  #   { device = "/nix/persist/swapfile"; size = 4096; }
-  # ];
-
-  # this can be a partition. create with:
-  #   fdisk <dev>
-  #     n
-  #     <default partno>
-  #     <start>
-  #     <end>
-  #     t
-  #     <partno>
-  #     19  # set part type to Linux swap
-  #     w   # write changes
-  #   mkswap -L swap <part>
-  # swapDevices = [
-  #   {
-  #     label = "swap";
-  #     # TODO: randomEncryption.enable = true;
-  #   }
-  # ];
-}
-
--- a/hosts/by-name/servo/net.nix
+++ b/hosts/by-name/servo/net.nix
@@ -1,233 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  portOpts = with lib; types.submodule {
-    options = {
-      visibleTo.ovpn = mkOption {
-        type = types.bool;
-        default = false;
-      };
-    };
-  };
-in
-{
-  options = with lib; {
-    sane.ports.ports = mkOption {
-      # add the `visibleTo.ovpn` option
-      type = types.attrsOf portOpts;
-    };
-  };
-
-  config = {
-    networking.domain = "uninsane.org";
-
-    sane.ports.openFirewall = true;
-    sane.ports.openUpnp = true;
-
-    # view refused packets with: `sudo journalctl -k`
-    # networking.firewall.logRefusedPackets = true;
-
-    # The global useDHCP flag is deprecated, therefore explicitly set to false here.
-    # Per-interface useDHCP will be mandatory in the future, so this generated config
-    # replicates the default behaviour.
-    networking.useDHCP = false;
-    networking.interfaces.eth0.useDHCP = true;
-    # XXX colin: probably don't need this. wlan0 won't be populated unless i touch a value in networking.interfaces.wlan0
-    networking.wireless.enable = false;
-
-    # this is needed to forward packets from the VPN to the host
-    boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
-
-    # unless we add interface-specific settings for each VPN, we have to define nameservers globally.
-    # networking.nameservers = [
-    #   "1.1.1.1"
-    #   "9.9.9.9"
-    # ];
-
-    # use systemd's stub resolver.
-    # /etc/resolv.conf isn't sophisticated enough to use different servers per net namespace (or link).
-    # instead, running the stub resolver on a known address in the root ns lets us rewrite packets
-    # in the ovnps namespace to use the provider's DNS resolvers.
-    # a weakness is we can only query 1 NS at a time (unless we were to clone the packets?)
-    # there also seems to be some cache somewhere that's shared between the two namespaces.
-    # i think this is a libc thing. might need to leverage proper cgroups to _really_ kill it.
-    # - getent ahostsv4 www.google.com
-    # - try fix: <https://serverfault.com/questions/765989/connect-to-3rd-party-vpn-server-but-dont-use-it-as-the-default-route/766290#766290>
-    services.resolved.enable = true;
-    # without DNSSEC:
-    # - dig matrix.org => works
-    # - curl https://matrix.org => works
-    # with default DNSSEC:
-    # - dig matrix.org => works
-    # - curl https://matrix.org => fails
-    # i don't know why. this might somehow be interfering with the DNS run on this device (trust-dns)
-    services.resolved.dnssec = "false";
-    networking.nameservers = [
-      # use systemd-resolved resolver
-      # full resolver (which understands /etc/hosts) lives on 127.0.0.53
-      # stub resolver (just forwards upstream) lives on 127.0.0.54
-      "127.0.0.53"
-    ];
-
-    # nscd -- the Name Service Caching Daemon -- caches DNS query responses
-    # in a way that's unaware of my VPN routing, so routes are frequently poor against
-    # services which advertise different IPs based on geolocation.
-    # nscd claims to be usable without a cache, but in practice i can't get it to not cache!
-    # nsncd is the Name Service NON-Caching Daemon. it's a drop-in that doesn't cache;
-    # this is OK on the host -- because systemd-resolved caches. it's probably sub-optimal
-    # in the netns and we query upstream DNS more often than needed. hm.
-    # TODO: run a separate recursive resolver in each namespace.
-    services.nscd.enableNsncd = true;
-
-    # services.resolved.extraConfig = ''
-    #   # docs: `man resolved.conf`
-    #   # DNS servers to use via the `wg-ovpns` interface.
-    #   #   i hope that from the root ns, these aren't visible.
-    #   DNS=46.227.67.134%wg-ovpns 192.165.9.158%wg-ovpns
-    #   FallbackDNS=1.1.1.1 9.9.9.9
-    # '';
-
-    # OVPN CONFIG (https://www.ovpn.com):
-    # DOCS: https://nixos.wiki/wiki/WireGuard
-    # if you `systemctl restart wireguard-wg-ovpns`, make sure to also restart any other services in `NetworkNamespacePath = .../ovpns`.
-    # TODO: why not create the namespace as a seperate operation (nix config for that?)
-    networking.wireguard.enable = true;
-    networking.wireguard.interfaces.wg-ovpns = let
-      ip = "${pkgs.iproute2}/bin/ip";
-      in-ns = "${ip} netns exec ovpns";
-      iptables = "${pkgs.iptables}/bin/iptables";
-      veth-host-ip = "10.0.1.5";
-      veth-local-ip = "10.0.1.6";
-      vpn-ip = "185.157.162.178";
-      # DNS = 46.227.67.134, 192.165.9.158, 2a07:a880:4601:10f0:cd45::1, 2001:67c:750:1:cafe:cd45::1
-      vpn-dns = "46.227.67.134";
-      bridgePort = port: proto: ''
-        ${in-ns} ${iptables} -A PREROUTING -t nat -p ${proto} --dport ${port} -m iprange --dst-range ${vpn-ip} \
-          -j DNAT --to-destination ${veth-host-ip}
-      '';
-      bridgeStatements = lib.foldlAttrs
-        (acc: port: portCfg: acc ++ (builtins.map (bridgePort port) portCfg.protocol))
-        []
-        config.sane.ports.ports;
-    in {
-      privateKeyFile = config.sops.secrets.wg_ovpns_privkey.path;
-      # wg is active only in this namespace.
-      # run e.g. ip netns exec ovpns <some command like ping/curl/etc, it'll go through wg>
-      #   sudo ip netns exec ovpns ping www.google.com
-      interfaceNamespace = "ovpns";
-      ips = [
-        "185.157.162.178/32"
-      ];
-      peers = [
-        {
-          publicKey = "SkkEZDCBde22KTs/Hc7FWvDBfdOCQA4YtBEuC3n5KGs=";
-          endpoint = "185.157.162.10:9930";
-          # alternatively: use hostname, but that presents bootstrapping issues (e.g. if host net flakes)
-          # endpoint = "vpn36.prd.amsterdam.ovpn.com:9930";
-          allowedIPs = [ "0.0.0.0/0" ];
-          # nixOS says this is important for keeping NATs active
-          persistentKeepalive = 25;
-          # re-executes wg this often. docs hint that this might help wg notice DNS/hostname changes.
-          # so, maybe that helps if we specify endpoint as a domain name
-          # dynamicEndpointRefreshSeconds = 30;
-          # when refresh fails, try it again after this period instead.
-          # TODO: not avail until nixpkgs upgrade
-          # dynamicEndpointRefreshRestartSeconds = 5;
-        }
-      ];
-      preSetup = ''
-        ${ip} netns add ovpns || echo "ovpns already exists"
-      '';
-      postShutdown = ''
-        ${in-ns} ip link del ovpns-veth-b || echo "couldn't delete ovpns-veth-b"
-        ${ip} link del ovpns-veth-a || echo "couldn't delete ovpns-veth-a"
-        ${ip} netns delete ovpns || echo "couldn't delete ovpns"
-        # restore rules/routes
-        ${ip} rule del from ${veth-host-ip} lookup ovpns pref 50 || echo "couldn't delete init -> ovpns rule"
-        ${ip} route del default via ${veth-local-ip} dev ovpns-veth-a proto kernel src ${veth-host-ip} metric 1002 table ovpns || echo "couldn't delete init -> ovpns route"
-        ${ip} rule add from all lookup local pref 0
-        ${ip} rule del from all lookup local pref 100
-      '';
-      postSetup = ''
-        # DOCS:
-        # - some of this approach is described here: <https://josephmuia.ca/2018-05-16-net-namespaces-veth-nat/>
-        # - iptables primer: <https://danielmiessler.com/study/iptables/>
-        # create veth pair
-        ${ip} link add ovpns-veth-a type veth peer name ovpns-veth-b
-        ${ip} addr add ${veth-host-ip}/24 dev ovpns-veth-a
-        ${ip} link set ovpns-veth-a up
-
-        # mv veth-b into the ovpns namespace
-        ${ip} link set ovpns-veth-b netns ovpns
-        ${in-ns} ip addr add ${veth-local-ip}/24 dev ovpns-veth-b
-        ${in-ns} ip link set ovpns-veth-b up
-
-        # make it so traffic originating from the host side of the veth
-        # is sent over the veth no matter its destination.
-        ${ip} rule add from ${veth-host-ip} lookup ovpns pref 50
-        # for traffic originating at the host veth to the WAN, use the veth as our gateway
-        # not sure if the metric 1002 matters.
-        ${ip} route add default via ${veth-local-ip} dev ovpns-veth-a proto kernel src ${veth-host-ip} metric 1002 table ovpns
-        # give the default route lower priority
-        ${ip} rule add from all lookup local pref 100
-        ${ip} rule del from all lookup local pref 0
-
-        # in order to access DNS in this netns, we need to route it to the VPN's nameservers
-        # - alternatively, we could fix DNS servers like 1.1.1.1.
-        ${in-ns} ${iptables} -A OUTPUT -t nat -p udp --dport 53 -m iprange --dst-range 127.0.0.53 \
-          -j DNAT --to-destination ${vpn-dns}:53
-      '' + (lib.concatStringsSep "\n" bridgeStatements);
-    };
-
-    # create a new routing table that we can use to proxy traffic out of the root namespace
-    # through the ovpns namespace, and to the WAN via VPN.
-    networking.iproute2.rttablesExtraConfig = ''
-      5 ovpns
-    '';
-    networking.iproute2.enable = true;
-
-
-    # HURRICANE ELECTRIC CONFIG:
-    # networking.sits = {
-    #   hurricane = {
-    #     remote = "216.218.226.238";
-    #     local = "192.168.0.5";
-    #     # local = "10.0.0.5";
-    #     # remote = "10.0.0.1";
-    #     # local = "10.0.0.22";
-    #     dev = "eth0";
-    #     ttl = 255;
-    #   };
-    # };
-    # networking.interfaces."hurricane".ipv6 = {
-    #   addresses = [
-    #     # mx.uninsane.org (publically routed /64)
-    #     {
-    #       address = "2001:470:b:465::1";
-    #       prefixLength = 128;
-    #     }
-    #     # client addr
-    #     # {
-    #     #   address = "2001:470:a:466::2";
-    #     #   prefixLength = 64;
-    #     # }
-    #   ];
-    #   routes = [
-    #     {
-    #       address = "::";
-    #       prefixLength = 0;
-    #       # via = "2001:470:a:466::1";
-    #     }
-    #   ];
-    # };
-
-    # # after configuration, we want the hurricane device to look like this:
-    # # hurricane: flags=209<UP,POINTOPOINT,RUNNING,NOARP>  mtu 1480
-    # #            inet6 2001:470:a:450::2  prefixlen 64  scopeid 0x0<global>
-    # #            inet6 fe80::c0a8:16  prefixlen 64  scopeid 0x20<link>
-    # #            sit  txqueuelen 1000  (IPv6-in-IPv4)
-    # # test with:
-    # #   curl --interface hurricane http://[2607:f8b0:400a:80b::2004]
-    # #   ping 2607:f8b0:400a:80b::2004
-  };
-}
--- a/hosts/by-name/servo/services/calibre.nix
+++ b/hosts/by-name/servo/services/calibre.nix
@@ -1,34 +0,0 @@
-{ config, lib, ... }:
-
-let
-  cweb-cfg = config.services.calibre-web;
-  inherit (cweb-cfg) user group;
-  inherit (cweb-cfg.listen) ip port;
-  svc-dir = "/var/lib/${cweb-cfg.dataDir}";
-in
-# XXX: disabled because of runtime errors like:
-# > File "/nix/store/c7jqvx980nlg9xhxi065cba61r2ain9y-calibre-web-0.6.19/lib/python3.10/site-packages/calibreweb/cps/db.py", line 926, in speaking_language
-# > languages = self.session.query(Languages) \
-# > AttributeError: 'NoneType' object has no attribute 'query'
-lib.mkIf false
-{
-  sane.persist.sys.byStore.plaintext = [
-    { inherit user group; mode = "0700"; path = svc-dir; }
-  ];
-
-  services.calibre-web.enable = true;
-  services.calibre-web.listen.ip = "127.0.0.1";
-  # XXX: externally populate `${svc-dir}/metadata.db` (once) from
-  #   <https://github.com/janeczku/calibre-web/blob/master/library/metadata.db>
-  # i don't know why you have to do this??
-  # services.calibre-web.options.calibreLibrary = svc-dir;
-
-  services.nginx.virtualHosts."calibre.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    locations."/" = {
-      proxyPass = "http://${ip}:${builtins.toString port}";
-    };
-  };
-  sane.dns.zones."uninsane.org".inet.CNAME."calibre" = "native";
-}
--- a/hosts/by-name/servo/services/coturn.nix
+++ b/hosts/by-name/servo/services/coturn.nix
@@ -1,124 +0,0 @@
-# TURN/STUN NAT traversal service
-# commonly used to establish realtime calls with prosody, or possibly matrix/synapse
-#
-# - <https://github.com/coturn/coturn/>
-# - `man turnserver`
-# - config docs: <https://github.com/coturn/coturn/blob/master/examples/etc/turnserver.conf>
-#
-# N.B. during operation it's NORMAL to see "error 401".
-# during session creation:
-# - client sends Allocate request
-# - server replies error 401, providing a realm and nonce
-# - client uses realm + nonce + shared secret to construct an auth key & call Allocate again
-# - server replies Allocate Success Response
-# - source: <https://stackoverflow.com/a/66643135>
-#
-# N.B. this safest implementation routes all traffic THROUGH A VPN
-# - that adds a lot of latency, but in practice turns out to be inconsequential.
-#   i guess ICE allows clients to prefer the other party's lower-latency server, in practice?
-# - still, this is the "safe" implementation because STUN works with IP addresses instead of domain names:
-#   1. client A queries the STUN server to determine its own IP address/port.
-#   2. client A tells client B which IP address/port client A is visible on.
-#   3. client B contacts that IP address/port
-#   this only works so long as the IP address/port which STUN server sees client A on is publicly routable.
-#   that is NOT the case when the STUN server and client A are on the same LAN
-#   even if client A contacts the STUN server via its WAN address with port reflection enabled.
-#   hence, there's no obvious way to put the STUN server on the same LAN as either client and expect the rest to work.
-{ lib, ... }:
-let
-  # TODO: this range could be larger, but right now that's costly because each element is its own UPnP forward
-  # TURN port range (inclusive)
-  turnPortLow = 49152;
-  turnPortHigh = 49167;
-  turnPortRange = lib.range turnPortLow turnPortHigh;
-in
-{
-  sane.ports.ports = lib.mkMerge ([
-    {
-      "3478" = {
-        # this is the "control" port.
-        # i.e. no client data is forwarded through it, but it's where clients request tunnels.
-        protocol = [ "tcp" "udp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-stun-turn";
-      };
-      "5349" = {
-        # the other port 3478 also supports TLS/DTLS, but presumably clients wanting TLS will default 5349
-        protocol = [ "tcp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-stun-turn-over-tls";
-      };
-    }
-  ] ++ (builtins.map
-    (port: {
-      "${builtins.toString port}" = let
-        count = port - turnPortLow + 1;
-        numPorts = turnPortHigh - turnPortLow + 1;
-      in {
-        protocol = [ "tcp" "udp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-turn-${builtins.toString count}-of-${builtins.toString numPorts}";
-      };
-    })
-    turnPortRange
-  ));
-
-  services.nginx.virtualHosts."turn.uninsane.org" = {
-    # allow ACME to procure a cert via nginx for this domain
-    enableACME = true;
-  };
-  sane.dns.zones."uninsane.org".inet = {
-    # CNAME."turn" = "servo.wan";
-    # CNAME."turn" = "ovpns";
-    # CNAME."turn" = "native";
-    # XXX: SRV records have to point to something with a A/AAAA record; no CNAMEs
-    A."turn" = "%AOVPNS%";
-    # A."turn" = "%AWAN%";
-
-    SRV."_stun._udp" =                        "5 50 3478 turn";
-    SRV."_stun._tcp" =                        "5 50 3478 turn";
-    SRV."_stuns._tcp" =                       "5 50 5349 turn";
-    SRV."_turn._udp" =                        "5 50 3478 turn";
-    SRV."_turn._tcp" =                        "5 50 3478 turn";
-    SRV."_turns._tcp" =                       "5 50 5349 turn";
-  };
-
-  sane.derived-secrets."/var/lib/coturn/shared_secret.bin" = {
-    encoding = "base64";
-    # TODO: make this not globally readable
-    acl.mode = "0644";
-  };
-  sane.fs."/var/lib/coturn/shared_secret.bin".wantedBeforeBy = [ "coturn.service" ];
-
-  # provide access to certs
-  users.users.turnserver.extraGroups = [ "nginx" ];
-
-  services.coturn.enable = true;
-  services.coturn.realm = "turn.uninsane.org";
-  services.coturn.cert = "/var/lib/acme/turn.uninsane.org/fullchain.pem";
-  services.coturn.pkey = "/var/lib/acme/turn.uninsane.org/key.pem";
-  services.coturn.use-auth-secret = true;
-  services.coturn.static-auth-secret-file = "/var/lib/coturn/shared_secret.bin";
-  services.coturn.lt-cred-mech = true;
-  services.coturn.min-port = turnPortLow;
-  services.coturn.max-port = turnPortHigh;
-  # services.coturn.secure-stun = true;
-  services.coturn.extraConfig = lib.concatStringsSep "\n" [
-    "verbose"
-    # "Verbose"  #< even MORE verbosity than "verbose"
-    # "no-multicast-peers"  # disables sending to IPv4 broadcast addresses (e.g. 224.0.0.0/3)
-    "listening-ip=10.0.1.5"
-    # "external-ip=185.157.162.178/10.0.1.5"
-    "external-ip=185.157.162.178"
-    # "listening-ip=10.78.79.51"  # can be specified multiple times; omit for *
-    # "external-ip=97.113.128.229/10.78.79.51"
-    # "external-ip=97.113.128.229"
-    # "mobility"  # "mobility with ICE (MICE) specs support" (?)
-  ];
-}
--- a/hosts/by-name/servo/services/ddns-afraid.nix
+++ b/hosts/by-name/servo/services/ddns-afraid.nix
@@ -1,27 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-# using manual ddns now
-lib.mkIf false
-{
-  systemd.services.ddns-afraid = {
-    description = "update dynamic DNS entries for freedns.afraid.org";
-    serviceConfig = {
-      EnvironmentFile = config.sops.secrets."ddns_afraid.env".path;
-      # TODO: ProtectSystem = "strict";
-      # TODO: ProtectHome = "full";
-      # TODO: PrivateTmp = true;
-    };
-    script = let
-      curl = "${pkgs.curl}/bin/curl -4";
-    in ''
-      ${curl} "https://freedns.afraid.org/dynamic/update.php?$AFRAID_KEY"
-    '';
-  };
-  systemd.timers.ddns-afraid = {
-    wantedBy = [ "multi-user.target" ];
-    timerConfig = {
-      OnStartupSec = "2min";
-      OnUnitActiveSec = "10min";
-    };
-  };
-}
--- a/hosts/by-name/servo/services/default.nix
+++ b/hosts/by-name/servo/services/default.nix
@@ -1,33 +0,0 @@
-{ ... }:
-{
-  imports = [
-    ./calibre.nix
-    ./coturn.nix
-    ./ddns-afraid.nix
-    ./ddns-he.nix
-    ./email
-    ./ejabberd.nix
-    ./freshrss.nix
-    ./export
-    ./gitea.nix
-    ./goaccess.nix
-    ./ipfs.nix
-    ./jackett.nix
-    ./jellyfin.nix
-    ./kiwix-serve.nix
-    ./komga.nix
-    ./lemmy.nix
-    ./matrix
-    ./navidrome.nix
-    ./nginx.nix
-    ./nixserve.nix
-    ./ntfy
-    ./pict-rs.nix
-    ./pleroma.nix
-    ./postgres.nix
-    ./prosody
-    ./transmission.nix
-    ./trust-dns.nix
-    ./wikipedia.nix
-  ];
-}
--- a/hosts/by-name/servo/services/ejabberd.nix
+++ b/hosts/by-name/servo/services/ejabberd.nix
@@ -1,471 +0,0 @@
-# docs:
-# - <https://docs.ejabberd.im/admin/configuration/basic>
-# example configs:
-# - <https://github.com/vkleen/machines/blob/138a2586ce185d7cf201d4e1fe898c83c4af52eb/hosts/europium/ejabberd.nix>
-# - <https://github.com/Mic92/stockholm/blob/675ef0088624c9de1cb531f318446316884a9d3d/tv/3modules/ejabberd/default.nix>
-# - <https://github.com/buffet/tararice/blob/master/programs/ejabberd.nix>
-#   - enables STUN and TURN
-#   - only over UDP 3478, not firewall-forwarding any TURN port range
-#   - uses stun_disco module (but with no options)
-# - <https://github.com/leo60228/dotfiles/blob/39b3abba3009bdc31413d4757ca2f882a33eec8b/files/ejabberd.yml>
-# - <https://github.com/Mic92/dotfiles/blob/ddf0f4821f554f7667fc803344657367c55fb9e6/nixos/eve/modules/ejabberd.nix>
-# - <nixpkgs:nixos/tests/xmpp/ejabberd.nix>
-# - 2013: <https://github.com/processone/ejabberd/blob/master/ejabberd.yml.example>
-#
-# compliance tests:
-# - <https://compliance.conversations.im/server/uninsane.org/#xep0352>
-#
-# administration:
-# - `sudo -u ejabberd ejabberdctl help`
-#
-# federation/support matrix:
-# - avatars
-#   - nixnet.services + dino: works in MUCs but not DMs  (as of 2023 H1)
-#   - movim.eu + dino: works in DMs, MUCs untested  (as of 2023/08/29)
-# - calls
-#   - local + dino: audio, video, works in DMs  (as of 2023/08/29)
-#   - movim.eu + dino: audio, video, works in DMs, no matter which side initiates  (as of 2023/08/30)
-#   - +native-cell-number@cheogram.com + dino: audio works in DMs, no matter which side initiates  (as of 2023/09/01)
-#     - can receive calls even if sender isn't in my roster
-#     - this is presumably using JMP.chat's SIP servers, which then convert it to XMPP call
-#
-# bugs:
-# - 2023/09/01: will randomly stop federating. `systemctl restart ejabberd` fixes, but takes 10 minutes.
-{ config, lib, pkgs, ... }:
-
-let
-  # TODO: this range could be larger, but right now that's costly because each element is its own UPnP forward
-  # TURN port range (inclusive)
-  turnPortLow = 49152;
-  turnPortHigh = 49167;
-  turnPortRange = lib.range turnPortLow turnPortHigh;
-in
-# XXX(2023/10/15): disabled in favor of Prosody.
-# everything configured below was fine: used ejabberd for several months.
-lib.mkIf false
-{
-  sane.persist.sys.byStore.plaintext = [
-    { user = "ejabberd"; group = "ejabberd"; path = "/var/lib/ejabberd"; }
-  ];
-  sane.ports.ports = lib.mkMerge ([
-    {
-      "3478" = {
-        protocol = [ "tcp" "udp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-stun-turn";
-      };
-      "5222" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-client-to-server";
-      };
-      "5223" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpps-client-to-server";  # XMPP over TLS
-      };
-      "5269" = {
-        protocol = [ "tcp" ];
-        visibleTo.wan = true;
-        description = "colin-xmpp-server-to-server";
-      };
-      "5270" = {
-        protocol = [ "tcp" ];
-        visibleTo.wan = true;
-        description = "colin-xmpps-server-to-server";  # XMPP over TLS
-      };
-      "5280" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-bosh";
-      };
-      "5281" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-bosh-https";
-      };
-      "5349" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-stun-turn-over-tls";
-      };
-      "5443" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-web-services";  # file uploads, websockets, admin
-      };
-    }
-  ] ++ (builtins.map
-    (port: {
-      "${builtins.toString port}" = let
-        count = port - turnPortLow + 1;
-        numPorts = turnPortHigh - turnPortLow + 1;
-      in {
-        protocol = [ "tcp" "udp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-xmpp-turn-${builtins.toString count}-of-${builtins.toString numPorts}";
-      };
-    })
-    turnPortRange
-  ));
-
-  # this ejabberd config uses builtin STUN/TURN server, so hack to ensure no other implementation fights for ports
-  services.coturn.enable = false;
-
-  # provide access to certs
-  # TODO: this should just be `acme`. then we also add nginx to the `acme` group.
-  #   why is /var/lib/acme/* owned by `nginx` group??
-  users.users.ejabberd.extraGroups = [ "nginx" ];
-
-  security.acme.certs."uninsane.org".extraDomainNames = [
-    "xmpp.uninsane.org"
-    "muc.xmpp.uninsane.org"
-    "pubsub.xmpp.uninsane.org"
-    "upload.xmpp.uninsane.org"
-    "vjid.xmpp.uninsane.org"
-  ];
-
-  # exists so the XMPP server's cert can obtain altNames for all its resources
-  services.nginx.virtualHosts."xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."muc.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."pubsub.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."upload.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."vjid.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-
-  sane.dns.zones."uninsane.org".inet = {
-    # XXX: SRV records have to point to something with a A/AAAA record; no CNAMEs
-    A."xmpp" =                "%ANATIVE%";
-    CNAME."muc.xmpp" =        "xmpp";
-    CNAME."pubsub.xmpp" =     "xmpp";
-    CNAME."upload.xmpp" =     "xmpp";
-    CNAME."vjid.xmpp" =       "xmpp";
-
-    # _Service._Proto.Name    TTL Class SRV    Priority Weight Port Target
-    # - <https://xmpp.org/extensions/xep-0368.html>
-    # something's requesting the SRV records for muc.xmpp, so let's include it
-    # nothing seems to request XMPP SRVs for the other records (except @)
-    # lower numerical priority field tells clients to prefer this method
-    SRV."_xmpps-client._tcp.muc.xmpp" =       "3 50 5223 xmpp";
-    SRV."_xmpps-server._tcp.muc.xmpp" =       "3 50 5270 xmpp";
-    SRV."_xmpp-client._tcp.muc.xmpp" =        "5 50 5222 xmpp";
-    SRV."_xmpp-server._tcp.muc.xmpp" =        "5 50 5269 xmpp";
-
-    SRV."_xmpps-client._tcp" =                "3 50 5223 xmpp";
-    SRV."_xmpps-server._tcp" =                "3 50 5270 xmpp";
-    SRV."_xmpp-client._tcp" =                 "5 50 5222 xmpp";
-    SRV."_xmpp-server._tcp" =                 "5 50 5269 xmpp";
-
-    SRV."_stun._udp" =                        "5 50 3478 xmpp";
-    SRV."_stun._tcp" =                        "5 50 3478 xmpp";
-    SRV."_stuns._tcp" =                       "5 50 5349 xmpp";
-    SRV."_turn._udp" =                        "5 50 3478 xmpp";
-    SRV."_turn._tcp" =                        "5 50 3478 xmpp";
-    SRV."_turns._tcp" =                       "5 50 5349 xmpp";
-  };
-
-  # TODO: allocate UIDs/GIDs ?
-  services.ejabberd.enable = true;
-  services.ejabberd.configFile = "/var/lib/ejabberd/ejabberd.yaml";
-  systemd.services.ejabberd.preStart = let
-    config-in = pkgs.writeText "ejabberd.yaml.in" (lib.generators.toYAML {} {
-      hosts = [ "uninsane.org" ];
-      # none | emergency | alert | critical | error | warning | notice | info | debug
-      loglevel = "debug";
-      acme.auto = false;
-      certfiles = [ "/var/lib/acme/uninsane.org/full.pem" ];
-      # ca_file = "${pkgs.cacert.unbundled}/etc/ssl/certs/";
-      # ca_file = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
-
-      pam_userinfotype = "jid";
-      acl = {
-        admin.user = [ "colin@uninsane.org" ];
-        local.user_regexp = "";
-        loopback.ip = [ "127.0.0.0/8" "::1/128" ];
-      };
-
-      access_rules = {
-        local.allow = "local";
-        c2s_access.allow = "all";
-        announce.allow = "admin";
-        configure.allow = "admin";
-        muc_create.allow = "local";
-        pubsub_createnode_access.allow = "all";
-        trusted_network.allow = "loopback";
-      };
-
-      # docs: <https://docs.ejabberd.im/admin/configuration/basic/#shaper-rules>
-      shaper_rules = {
-        # setting this to above 1 may break outgoing messages
-        # - maybe some servers rate limit? or just don't understand simultaneous connections?
-        max_s2s_connections = 1;
-        max_user_sessions = 10;
-        max_user_offline_messages = 5000;
-        c2s_shaper.fast = "all";
-        s2s_shaper.med = "all";
-      };
-
-      # docs: <https://docs.ejabberd.im/admin/configuration/basic/#shapers>
-      # this limits the bytes/sec.
-      # for example, burst: 3_000_000 and rate: 100_000 means:
-      # - each client has a BW budget that accumulates 100kB/sec and is capped at 3 MB
-      shaper.fast = 1000000;
-      shaper.med  =  500000;
-      # shaper.fast.rate       =  1000000;
-      # shaper.fast.burst_size = 10000000;
-      # shaper.med.rate        =   500000;
-      # shaper.med.burst_size  =  5000000;
-
-      # see: <https://docs.ejabberd.im/admin/configuration/listen/>
-      # s2s_use_starttls = true;
-      s2s_use_starttls = "optional";
-      # lessens 504: remote-server-timeout errors
-      # see: <https://github.com/processone/ejabberd/issues/3105#issuecomment-562182967>
-      negotiation_timeout = 60;
-
-      listen = [
-        {
-          port = 5222;
-          module = "ejabberd_c2s";
-          shaper = "c2s_shaper";
-          starttls = true;
-          access = "c2s_access";
-        }
-        {
-          port = 5223;
-          module = "ejabberd_c2s";
-          shaper = "c2s_shaper";
-          tls = true;
-          access = "c2s_access";
-        }
-        {
-          port = 5269;
-          module = "ejabberd_s2s_in";
-          shaper = "s2s_shaper";
-        }
-        {
-          port = 5270;
-          module = "ejabberd_s2s_in";
-          shaper = "s2s_shaper";
-          tls = true;
-        }
-        {
-          port = 5443;
-          module = "ejabberd_http";
-          tls = true;
-          request_handlers = {
-            "/admin" = "ejabberd_web_admin";  # TODO: ensure this actually works
-            "/api" = "mod_http_api";  # ejabberd API endpoint (to control server)
-            "/bosh" = "mod_bosh";
-            "/upload" = "mod_http_upload";
-            "/ws" = "ejabberd_http_ws";
-            # "/.well-known/host-meta" = "mod_host_meta";
-            # "/.well-known/host-meta.json" = "mod_host_meta";
-          };
-        }
-        {
-          # STUN+TURN TCP
-          # note that the full port range should be forwarded ("not NAT'd")
-          # `use_turn=true` enables both TURN *and* STUN
-          port = 3478;
-          module = "ejabberd_stun";
-          transport = "tcp";
-          use_turn = true;
-          turn_min_port = turnPortLow;
-          turn_max_port = turnPortHigh;
-          turn_ipv4_address = "%ANATIVE%";
-        }
-        {
-          # STUN+TURN UDP
-          port = 3478;
-          module = "ejabberd_stun";
-          transport = "udp";
-          use_turn = true;
-          turn_min_port = turnPortLow;
-          turn_max_port = turnPortHigh;
-          turn_ipv4_address = "%ANATIVE%";
-        }
-        {
-          # STUN+TURN TLS over TCP
-          port = 5349;
-          module = "ejabberd_stun";
-          transport = "tcp";
-          tls = true;
-          certfile = "/var/lib/acme/uninsane.org/full.pem";
-          use_turn = true;
-          turn_min_port = turnPortLow;
-          turn_max_port = turnPortHigh;
-          turn_ipv4_address = "%ANATIVE%";
-        }
-      ];
-
-      # TODO: enable mod_fail2ban
-      # TODO(low): look into mod_http_fileserver for serving macros?
-      modules = {
-        # mod_adhoc = {};
-        # mod_announce = {
-        #   access = "admin";
-        # };
-        # allows users to set avatars in vCard
-        # - <https://docs.ejabberd.im/admin/configuration/modules/#mod-avatar>
-        mod_avatar = {};
-        mod_caps = {};  # for mod_pubsub
-        mod_carboncopy = {};  # allows multiple clients to receive a user's message
-        # queues messages when recipient is offline, including PEP and presence messages.
-        # compliance test suggests this be enabled
-        mod_client_state = {};
-
-        # mod_conversejs: TODO: enable once on 21.12
-        # allows clients like Dino to discover where to upload files
-        mod_disco.server_info = [
-          {
-            modules = "all";
-            name = "abuse-addresses";
-            urls = [
-              "mailto:admin.xmpp@uninsane.org"
-              "xmpp:colin@uninsane.org"
-            ];
-          }
-          {
-            modules = "all";
-            name = "admin-addresses";
-            urls = [
-              "mailto:admin.xmpp@uninsane.org"
-              "xmpp:colin@uninsane.org"
-            ];
-          }
-        ];
-        mod_http_upload = {
-          host = "upload.xmpp.uninsane.org";
-          hosts = [ "upload.xmpp.uninsane.org" ];
-          put_url = "https://@HOST@:5443/upload";
-          dir_mode = "0750";
-          file_mode = "0750";
-          rm_on_unregister = false;
-        };
-        # allow discoverability of BOSH and websocket endpoints
-        # TODO: enable once on ejabberd 22.05  (presently 21.04)
-        # mod_host_meta = {};
-        mod_jidprep = {};  # probably not needed: lets clients normalize jids
-        mod_last = {};  # allow other users to know when i was last online
-        mod_mam = {
-          # Mnesia is limited to 2GB, better to use an SQL backend
-          # For small servers SQLite is a good fit and is very easy
-          # to configure. Uncomment this when you have SQL configured:
-          # db_type: sql
-          assume_mam_usage = true;
-          default = "always";
-        };
-        mod_muc = {
-          access = [ "allow" ];
-          access_admin = { allow = "admin"; };
-          access_create = "muc_create";
-          access_persistent = "muc_create";
-          access_mam = [ "allow" ];
-          history_size = 100;  # messages to show new participants
-          host = "muc.xmpp.uninsane.org";
-          hosts = [ "muc.xmpp.uninsane.org" ];
-          default_room_options = {
-            anonymous = false;
-            lang = "en";
-            persistent = true;
-            mam = true;
-          };
-        };
-        mod_muc_admin = {};
-        mod_offline = {
-          # store messages for a user when they're offline (TODO: understand multi-client workflow?)
-          access_max_user_messages = "max_user_offline_messages";
-          store_groupchat = true;
-        };
-        mod_ping = {};
-        mod_privacy = {};  # deprecated, but required for `ejabberctl export_piefxis`
-        mod_private = {};  # allow local clients to persist arbitrary data on my server
-        # push notifications to services integrated with e.g. Apple/Android.
-        # default is for a maximum amount of PII to be withheld, since these push notifs
-        # generally traverse 3rd party services. can opt to include message body, etc, though.
-        mod_push = {};
-        # i don't fully understand what this does, but it seems aimed at making push notifs more reliable.
-        mod_push_keepalive = {};
-        mod_roster = {
-          versioning = true;
-        };
-        # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-s2s-dialback>
-        # s2s dialback to verify inbound messages
-        # unclear to what degree the XMPP network requires this
-        mod_s2s_dialback = {};
-        mod_shared_roster = {};  # creates groups for @all, @online, and anything manually administered?
-        mod_stream_mgmt = {
-          # resend undelivered messages if the origin client is offline
-          resend_on_timeout = "if_offline";
-        };
-        # fallback for when DNS-based STUN discovery is unsupported.
-        # - see: <https://xmpp.org/extensions/xep-0215.html>
-        # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-stun-disco>
-        # people say to just keep this defaulted (i guess ejabberd knows to return its `host` option of uninsane.org?)
-        mod_stun_disco = {};
-        # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-vcard>
-        mod_vcard = {
-          allow_return_all = true;  # all users are discoverable (?)
-          host = "vjid.xmpp.uninsane.org";
-          hosts = [ "vjid.xmpp.uninsane.org" ];
-          search = true;
-        };
-        mod_vcard_xupdate = {};  # needed for avatars
-        # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-pubsub>
-        mod_pubsub = {
-          #^ needed for avatars
-          access_createnode = "pubsub_createnode_access";
-          host = "pubsub.xmpp.uninsane.org";
-          hosts = [ "pubsub.xmpp.uninsane.org" ];
-          ignore_pep_from_offline = false;
-          last_item_cache = true;
-          plugins = [
-            "pep"
-            "flat"
-          ];
-          force_node_config = {
-            # ensure client bookmarks are private
-            "storage:bookmarks:" = {
-              "access_model" = "whitelist";
-            };
-            "urn:xmpp:avatar:data" = {
-              "access_model" = "open";
-            };
-            "urn:xmpp:avatar:metadata" = {
-              "access_model" = "open";
-            };
-          };
-        };
-        mod_version = {};
-      };
-    });
-    sed = "${pkgs.gnused}/bin/sed";
-  in ''
-    ip=$(cat '${config.sane.services.dyn-dns.ipPath}')
-    # config is 444 (not 644), so we want to write out-of-place and then atomically move
-    # TODO: factor this out into `sane-woop` helper?
-    rm -f /var/lib/ejabberd/ejabberd.yaml.new
-    ${sed} "s/%ANATIVE%/$ip/g" ${config-in} > /var/lib/ejabberd/ejabberd.yaml.new
-    mv /var/lib/ejabberd/ejabberd.yaml{.new,}
-  '';
-
-  sane.services.dyn-dns.restartOnChange = [ "ejabberd.service" ];
-}
--- a/hosts/by-name/servo/services/email/default.nix
+++ b/hosts/by-name/servo/services/email/default.nix
@@ -1,44 +0,0 @@
-# nix configs to reference:
-# - <https://gitlab.com/simple-nixos-mailserver/nixos-mailserver>
-# - <https://github.com/nix-community/nur-combined/-/tree/master/repos/eh5/machines/srv-m/mail-rspamd.nix>
-#   - postfix / dovecot / rspamd / stalwart-jmap / sogo
-#
-# rspamd:
-# - nixos: <https://nixos.wiki/wiki/Rspamd>
-# - guide: <https://rspamd.com/doc/quickstart.html>
-# - non-nixos example: <https://dataswamp.org/~solene/2021-07-13-smtpd-rspamd.html>
-#
-#
-# my rough understanding of the pieces:
-# - postfix handles SMTP protocol with the rest of the world.
-# - dovecot implements IMAP protocol.
-#   - client auth (i.e. validate that user@uninsane.org is who they claim)
-#   - "folders" (INBOX, JUNK) are internal to dovecot?
-#     or where do folders live, on-disk?
-#
-# - non-local clients (i.e. me) interact with BOTH postfix and dovecot, but primarily dovecot:
-#   - mail reading is done via IMAP (so, dovecot)
-#   - mail sending is done via SMTP/submission port (so, postfix)
-#     - but postfix delegates authorization of that outgoing mail to dovecot, on the server side
-#
-# - local clients (i.e. sendmail) interact only with postfix
-#
-# debugging: general connectivity issues
-# - test that inbound port 25 is unblocked:
-#   - `curl https://canyouseeme.org/ --data 'port=25&IP=185.157.162.178' | grep 'see your service'`
-#     - and retry with port 465, 587
-#     - i think this API requires the queried IP match the source IP
-#   - if necessary, `systemctl stop postfix` and `sudo nc -l 185.157.162.178 25`, then try https://canyouseeme.org
-
-{ ... }:
-{
-  imports = [
-    ./dovecot.nix
-    ./postfix.nix
-  ];
-
-
-  #### SPAM FILTERING
-  # services.rspamd.enable = true;
-  # services.rspamd.postfix.enable = true;
-}
--- a/hosts/by-name/servo/services/email/dovecot.nix
+++ b/hosts/by-name/servo/services/email/dovecot.nix
@@ -1,142 +0,0 @@
-# dovecot config options: <https://doc.dovecot.org/configuration_manual/>
-#
-# sieve docs:
-# - sieve language examples: <https://doc.dovecot.org/configuration_manual/sieve/examples/>
-# - sieve protocol/language: <https://proton.me/support/sieve-advanced-custom-filters>
-
-{ config, lib, pkgs, ... }:
-{
-  sane.ports.ports."143" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-imap-imap.uninsane.org";
-  };
-  sane.ports.ports."993" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-imaps-imap.uninsane.org";
-  };
-
-  # exists only to manage certs for dovecot
-  services.nginx.virtualHosts."imap.uninsane.org" = {
-    enableACME = true;
-  };
-
-  sane.dns.zones."uninsane.org".inet = {
-    CNAME."imap" = "native";
-  };
-
-  sops.secrets."dovecot_passwd" = {
-    owner = config.users.users.dovecot2.name;
-    # TODO: debug why mail can't be sent without this being world-readable
-    mode = "0444";
-  };
-
-  # inspired by https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/
-  services.dovecot2.enable = true;
-  # services.dovecot2.enableLmtp = true;
-  services.dovecot2.sslServerCert = "/var/lib/acme/imap.uninsane.org/fullchain.pem";
-  services.dovecot2.sslServerKey = "/var/lib/acme/imap.uninsane.org/key.pem";
-  services.dovecot2.enablePAM = false;
-
-  # sieve scripts require me to set a user for... idk why?
-  services.dovecot2.mailUser = "colin";
-  services.dovecot2.mailGroup = "users";
-  users.users.colin.isSystemUser = lib.mkForce false;
-
-  services.dovecot2.extraConfig =
-  let
-    passwdFile = config.sops.secrets.dovecot_passwd.path;
-  in
-    ''
-    passdb {
-      driver = passwd-file
-      args = ${passwdFile}
-    }
-    userdb {
-      driver = passwd-file
-      args = ${passwdFile}
-    }
-
-    # allow postfix to query our auth db
-    service auth {
-      unix_listener auth {
-        mode = 0660
-        user = postfix
-        group = postfix
-      }
-    }
-    auth_mechanisms = plain login
-
-    # accept incoming messaging from postfix
-    # service lmtp {
-    #   unix_listener dovecot-lmtp {
-    #     mode = 0600
-    #     user = postfix
-    #     group = postfix
-    #   }
-    # }
-
-    # plugin {
-    #   sieve_plugins = sieve_imapsieve
-    # }
-
-    mail_debug = yes
-    auth_debug = yes
-    # verbose_ssl = yes
-  '';
-
-  services.dovecot2.mailboxes = {
-    # special-purpose mailboxes: "All" "Archive" "Drafts" "Flagged" "Junk" "Sent" "Trash"
-    # RFC6154 describes these special mailboxes: https://www.ietf.org/rfc/rfc6154.html
-    # how these boxes are treated is 100% up to the client and server to decide.
-    # client behavior:
-    # iOS
-    #   - Drafts: ?
-    #   - Sent: works
-    #   - Trash: works
-    #   - Junk: works ("mark" -> "move to Junk")
-    # aerc
-    #   - Drafts: works
-    #   - Sent: works
-    #   - Trash: no; deleted messages are actually deleted
-    #       use `:move trash` instead
-    #   - Junk: ?
-    # Sent mailbox: all sent messages are copied to it. unclear if this happens server-side or client-side.
-    Drafts = { specialUse = "Drafts"; auto = "create"; };
-    Sent = { specialUse = "Sent"; auto = "create"; };
-    Trash = { specialUse = "Trash"; auto = "create"; };
-    Junk = { specialUse = "Junk"; auto = "create"; };
-  };
-
-  services.dovecot2.mailPlugins = {
-    perProtocol = {
-      # imap.enable = [
-      #   "imap_sieve"
-      # ];
-      lda.enable = [
-        "sieve"
-      ];
-      # lmtp.enable = [
-      #   "sieve"
-      # ];
-    };
-  };
-  services.dovecot2.modules = [
-    pkgs.dovecot_pigeonhole  # enables sieve execution (?)
-  ];
-  services.dovecot2.sieveScripts = {
-    # if any messages fail to pass (or lack) DKIM, move them to Junk
-    # XXX the key name ("after") is only used to order sieve execution/ordering
-    after = builtins.toFile "ensuredkim.sieve" ''
-      require "fileinto";
-
-      if not header :contains "Authentication-Results" "dkim=pass" {
-        fileinto "Junk";
-        stop;
-      }
-    '';
-  };
-}
--- a/hosts/by-name/servo/services/email/postfix.nix
+++ b/hosts/by-name/servo/services/email/postfix.nix
@@ -1,198 +0,0 @@
-# postfix config options: <https://www.postfix.org/postconf.5.html>
-
-{ lib, pkgs, ... }:
-
-let
-  submissionOptions = {
-    smtpd_tls_security_level = "encrypt";
-    smtpd_sasl_auth_enable = "yes";
-    smtpd_sasl_type = "dovecot";
-    smtpd_sasl_path = "/run/dovecot2/auth";
-    smtpd_sasl_security_options = "noanonymous";
-    smtpd_sasl_local_domain = "uninsane.org";
-    smtpd_client_restrictions = "permit_sasl_authenticated,reject";
-    # reuse the virtual map so that sender mapping matches recipient mapping
-    smtpd_sender_login_maps = "hash:/var/lib/postfix/conf/virtual";
-    smtpd_sender_restrictions = "reject_sender_login_mismatch";
-    smtpd_recipient_restrictions = "reject_non_fqdn_recipient,permit_sasl_authenticated,reject";
-  };
-in
-{
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode? could be more granular
-    { user = "opendkim"; group = "opendkim"; path = "/var/lib/opendkim"; }
-    { user = "root"; group = "root"; path = "/var/lib/postfix"; }
-    { user = "root"; group = "root"; path = "/var/spool/mail"; }
-    # *probably* don't need these dirs:
-    # "/var/lib/dhparams"          # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/security/dhparams.nix
-    # "/var/lib/dovecot"
-  ];
-
-  # XXX(2023/10/20): opening these ports in the firewall has the OPPOSITE effect as intended.
-  # these ports are only routable so long as they AREN'T opened.
-  # probably some cursed interaction with network namespaces introduced after 2023/10/10.
-  # sane.ports.ports."25" = {
-  #   protocol = [ "tcp" ];
-  #   # XXX visibleTo.lan effectively means "open firewall, but don't configure any NAT/forwarding"
-  #   visibleTo.lan = true;
-  #   description = "colin-smtp-mx.uninsane.org";
-  # };
-  # sane.ports.ports."465" = {
-  #   protocol = [ "tcp" ];
-  #   visibleTo.lan = true;
-  #   description = "colin-smtps-mx.uninsane.org";
-  # };
-  # sane.ports.ports."587" = {
-  #   protocol = [ "tcp" ];
-  #   visibleTo.lan = true;
-  #   description = "colin-smtps-submission-mx.uninsane.org";
-  # };
-
-  # exists only to manage certs for Postfix
-  services.nginx.virtualHosts."mx.uninsane.org" = {
-    enableACME = true;
-  };
-
-
-  sane.dns.zones."uninsane.org".inet = {
-    MX."@" = "10 mx.uninsane.org.";
-    # XXX: RFC's specify that the MX record CANNOT BE A CNAME
-    A."mx" = "185.157.162.178";
-
-    # Sender Policy Framework:
-    #   +mx     => mail passes if it originated from the MX
-    #   +a      => mail passes if it originated from the A address of this domain
-    #   +ip4:.. => mail passes if it originated from this IP
-    #   -all    => mail fails if none of these conditions were met
-    TXT."@" = "v=spf1 a mx -all";
-
-    # DKIM public key:
-    TXT."mx._domainkey" =
-      "v=DKIM1;k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkSyMufc2KrRx3j17e/LyB+3eYSBRuEFT8PUka8EDX04QzCwDPdkwgnj3GNDvnB5Ktb05Cf2SJ/S1OLqNsINxJRWtkVfZd/C339KNh9wrukMKRKNELL9HLUw0bczOI4gKKFqyrRE9qm+4csCMAR79Te9FCjGV/jVnrkLdPT0GtFwIDAQAB"
-    ;
-
-    # DMARC fields <https://datatracker.ietf.org/doc/html/rfc7489>:
-    #   p=none|quarantine|reject: what to do with failures
-    #   sp = p but for subdomains
-    #   rua = where to send aggregrate reports
-    #   ruf = where to send individual failure reports
-    #   fo=0|1|d|s  controls WHEN to send failure reports
-    #     (1=on bad alignment; d=on DKIM failure; s=on SPF failure);
-    # Additionally:
-    #   adkim=r|s  (is DKIM relaxed [default] or strict)
-    #   aspf=r|s   (is SPF relaxed [default] or strict)
-    #   pct = sampling ratio for punishing failures (default 100 for 100%)
-    #   rf = report format
-    #   ri = report interval
-    TXT."_dmarc" =
-      "v=DMARC1;p=quarantine;sp=reject;rua=mailto:admin+mail@uninsane.org;ruf=mailto:admin+mail@uninsane.org;fo=1:d:s"
-    ;
-  };
-
-  services.postfix.enable = true;
-  services.postfix.hostname = "mx.uninsane.org";
-  services.postfix.origin = "uninsane.org";
-  services.postfix.destination = [ "localhost" "uninsane.org" ];
-  services.postfix.sslCert = "/var/lib/acme/mx.uninsane.org/fullchain.pem";
-  services.postfix.sslKey = "/var/lib/acme/mx.uninsane.org/key.pem";
-
-  services.postfix.virtual = ''
-    notify.matrix@uninsane.org matrix-synapse
-    @uninsane.org colin
-  '';
-
-  services.postfix.config = {
-    # smtpd_milters = local:/run/opendkim/opendkim.sock
-    # milter docs: http://www.postfix.org/MILTER_README.html
-    # mail filters for receiving email and from authorized SMTP clients (i.e. via submission)
-    # smtpd_milters = inet:185.157.162.190:8891
-    # opendkim.sock will add a Authentication-Results header, with `dkim=pass|fail|...` value to received messages
-    smtpd_milters = "unix:/run/opendkim/opendkim.sock";
-    # mail filters for sendmail
-    non_smtpd_milters = "$smtpd_milters";
-
-    # what to do when a milter exits unexpectedly:
-    milter_default_action = "accept";
-
-    inet_protocols = "ipv4";
-    smtp_tls_security_level = "may";
-
-    # hand received mail over to dovecot so that it can run sieves & such
-    mailbox_command = ''${pkgs.dovecot}/libexec/dovecot/dovecot-lda -f "$SENDER" -a "$RECIPIENT"'';
-
-    # hand received mail over to dovecot
-    # virtual_alias_maps = [
-    #   "hash:/etc/postfix/virtual"
-    # ];
-    # mydestination = "";
-    # virtual_mailbox_domains = [ "localhost" "uninsane.org" ];
-    # # virtual_mailbox_maps = "hash:/etc/postfix/virtual";
-    # virtual_transport = "lmtp:unix:/run/dovecot2/dovecot-lmtp";
-
-    # anti-spam options: <https://www.postfix.org/SMTPD_ACCESS_README.html>
-    # reject_unknown_sender_domain: causes postfix to `dig <sender> MX` and make sure that exists.
-    # but may cause problems receiving mail from google & others who load-balance?
-    # - <https://unix.stackexchange.com/questions/592131/how-to-reject-email-from-unknown-domains-with-postfix-on-centos>
-    # smtpd_sender_restrictions = reject_unknown_sender_domain
-  };
-
-  services.postfix.enableSubmission = true;
-  services.postfix.submissionOptions = submissionOptions;
-  services.postfix.enableSubmissions = true;
-  services.postfix.submissionsOptions = submissionOptions;
-
-  systemd.services.postfix.after = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.postfix.partOf = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.postfix.serviceConfig = {
-    # run this behind the OVPN static VPN
-    NetworkNamespacePath = "/run/netns/ovpns";
-  };
-
-
-  #### OPENDKIM
-
-  services.opendkim.enable = true;
-  # services.opendkim.domains = "csl:uninsane.org";
-  services.opendkim.domains = "uninsane.org";
-
-  # we use a custom (inet) socket, because the default perms
-  # of the unix socket don't allow postfix to connect.
-  # this sits on the machine-local 10.0.1 interface because it's the closest
-  # thing to a loopback interface shared by postfix and opendkim netns.
-  # services.opendkim.socket = "inet:8891@185.157.162.190";
-  # services.opendkim.socket = "local:/run/opendkim.sock";
-  # selectors can be used to disambiguate sender machines.
-  # keeping this the same as the hostname seems simplest
-  services.opendkim.selector = "mx";
-
-  systemd.services.opendkim.after = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.opendkim.partOf = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.opendkim.serviceConfig = {
-    # run this behind the OVPN static VPN
-    NetworkNamespacePath = "/run/netns/ovpns";
-    # /run/opendkim/opendkim.sock needs to be rw by postfix
-    UMask = lib.mkForce "0011";
-  };
-
-
-  #### OUTGOING MESSAGE REWRITING:
-  services.postfix.enableHeaderChecks = true;
-  services.postfix.headerChecks = [
-    # intercept gitea registration confirmations and manually screen them
-    {
-      # headerChecks are somehow ignorant of alias rules: have to redirect to a real user
-      action = "REDIRECT colin@uninsane.org";
-      pattern = "/^Subject: Please activate your account/";
-    }
-    # intercept Matrix registration confirmations
-    {
-      action = "REDIRECT colin@uninsane.org";
-      pattern = "/^Subject:.*Validate your email/";
-    }
-    # XXX postfix only supports performing ONE action per header.
-    # {
-    #   action = "REPLACE Subject: git application: Please activate your account";
-    #   pattern = "/^Subject:.*activate your account/";
-    # }
-  ];
-}
--- a/hosts/by-name/servo/services/export/default.nix
+++ b/hosts/by-name/servo/services/export/default.nix
@@ -1,53 +0,0 @@
-{ config, ... }:
-{
-  imports = [
-    ./nfs.nix
-    ./sftpgo.nix
-  ];
-
-  users.groups.export = {};
-
-  fileSystems."/var/export/media" = {
-    # everything in here could be considered publicly readable (based on the viewer's legal jurisdiction)
-    device = "/var/lib/uninsane/media";
-    options = [ "rbind" ];
-  };
-  # fileSystems."/var/export/playground" = {
-  #   device = config.fileSystems."/mnt/persist/ext".device;
-  #   fsType = "btrfs";
-  #   options = [
-  #     "subvol=export-playground"
-  #     "compress=zstd"
-  #     "defaults"
-  #   ];
-  # };
-  # N.B.: the backing directory should be manually created here **as a btrfs subvolume** and with a quota.
-  # - `sudo btrfs subvolume create /mnt/persist/ext/persist/var/export/playground`
-  # - `sudo btrfs quota enable /mnt/persist/ext/persist/var/export/playground`
-  # - `sudo btrfs quota rescan -sw /mnt/persist/ext/persist/var/export/playground`
-  # to adjust the limits (which apply at the block layer, i.e. post-compression):
-  # - `sudo btrfs qgroup limit 20G /mnt/persist/ext/persist/var/export/playground`
-  # to query the quota/status:
-  # - `sudo btrfs qgroup show -re /var/export/playground`
-  sane.persist.sys.ext = [
-    { user = "root"; group = "export"; mode = "0775"; path = "/var/export/playground"; }
-  ];
-
-  sane.fs."/var/export/README.md" = {
-    wantedBy = [ "nfs.service" "sftpgo.service" ];
-    file.text = ''
-      - media/         read-only:  Videos, Music, Books, etc
-      - playground/    read-write: use it to share files with other users of this server
-    '';
-  };
-
-  sane.fs."/var/export/playground/README.md" = {
-    wantedBy = [ "nfs.service" "sftpgo.service" ];
-    file.text = ''
-      this directory is intentionally read+write by anyone with access (i.e. on the LAN).
-      - share files
-      - write poetry
-      - be a friendly troll
-    '';
-  };
-}
--- a/hosts/by-name/servo/services/export/nfs.nix
+++ b/hosts/by-name/servo/services/export/nfs.nix
@@ -1,110 +0,0 @@
-# docs:
-# - <https://nixos.wiki/wiki/NFS>
-# - <https://wiki.gentoo.org/wiki/Nfs-utils>
-# system files:
-# - /etc/exports
-# system services:
-# - nfs-server.service
-# - nfs-idmapd.service
-# - nfs-mountd.service
-# - nfsdcld.service
-# - rpc-statd.service
-# - rpcbind.service
-#
-# TODO: force files to be 755, or 750.
-# - could maybe be done with some mount option?
-
-{ config, lib, ... }:
-{
-  services.nfs.server.enable = true;
-
-  # see which ports NFS uses with:
-  # - `rpcinfo -p`
-  sane.ports.ports."111" = {
-    protocol = [ "tcp" "udp" ];
-    visibleTo.lan = true;
-    description = "NFS server portmapper";
-  };
-  sane.ports.ports."2049" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    description = "NFS server";
-  };
-  sane.ports.ports."4000" = {
-    protocol = [ "udp" ];
-    visibleTo.lan = true;
-    description = "NFS server status daemon";
-  };
-  sane.ports.ports."4001" = {
-    protocol = [ "tcp" "udp" ];
-    visibleTo.lan = true;
-    description = "NFS server lock daemon";
-  };
-  sane.ports.ports."4002" = {
-    protocol = [ "tcp" "udp" ];
-    visibleTo.lan = true;
-    description = "NFS server mount daemon";
-  };
-
-  # NFS4 allows these to float, but NFS3 mandates specific ports, so fix them for backwards compat.
-  services.nfs.server.lockdPort = 4001;
-  services.nfs.server.mountdPort = 4002;
-  services.nfs.server.statdPort = 4000;
-
-  # format:
-  #   fspoint	visibility(options)
-  # options:
-  # - see: <https://wiki.gentoo.org/wiki/Nfs-utils#Exports>
-  # - see [man 5 exports](https://linux.die.net/man/5/exports)
-  # - insecure:  require clients use src port > 1024
-  # - rw, ro (default)
-  # - async, sync (default)
-  # - no_subtree_check (default), subtree_check: verify not just that files requested by the client live
-  #     in the expected fs, but also that they live under whatever subdirectory of that fs is exported.
-  # - no_root_squash, root_squash (default): map requests from uid 0 to user `nobody`.
-  # - crossmnt:  reveal filesystems that are mounted under this endpoint
-  # - fsid:  must be zero for the root export
-  #   - fsid=root  is alias for fsid=0
-  # - mountpoint[=/path]:  only export the directory if it's a mountpoint. used to avoid exporting failed mounts.
-  # - all_squash: rewrite all client requests such that they come from anonuid/anongid
-  #   - any files a user creates are owned by local anonuid/anongid.
-  #   - users can read any local file which anonuid/anongid would be able to read.
-  #   - users can't chown to/away from anonuid/anongid.
-  #   - users can chmod files they own, to anything (making them unreadable to non-`nfsuser` export users, like FTP).
-  #   - `stat` remains unchanged, returning the real UIDs/GIDs to the client.
-  #     - thus programs which check `uid` or `gid` before trying an operation may incorrectly conclude they can't perform some op.
-  #
-  # 10.0.0.0/8 to export both to LAN (readonly, unencrypted) and wg vpn (read-write, encrypted)
-  services.nfs.server.exports =
-  let
-    fmtExport = { export, baseOpts, extraLanOpts ? [], extraVpnOpts ? [] }:
-      let
-        always = [ "subtree_check" ];
-        lanOpts = always ++ baseOpts ++ extraLanOpts;
-        vpnOpts = always ++ baseOpts ++ extraVpnOpts;
-      in "${export} 10.78.79.0/22(${lib.concatStringsSep "," lanOpts}) 10.0.10.0/24(${lib.concatStringsSep "," vpnOpts})";
-  in lib.concatStringsSep "\n" [
-    (fmtExport {
-      export = "/var/export";
-      baseOpts = [ "crossmnt" "fsid=root" ];
-      extraLanOpts = [ "ro" ];
-      extraVpnOpts = [ "rw" "no_root_squash" ];
-    })
-    (fmtExport {
-      export = "/var/export/playground";
-      baseOpts = [
-        "mountpoint"
-        "all_squash"
-        "rw"
-        "anonuid=${builtins.toString config.users.users.nfsuser.uid}"
-        "anongid=${builtins.toString config.users.groups.export.gid}"
-      ];
-    })
-  ];
-
-  users.users.nfsuser = {
-    description = "virtual user for anonymous NFS operations";
-    group = "export";
-    isSystemUser = true;
-  };
-}
--- a/hosts/by-name/servo/services/export/sftpgo.nix
+++ b/hosts/by-name/servo/services/export/sftpgo.nix
@@ -1,184 +0,0 @@
-# docs:
-# - <https://github.com/drakkan/sftpgo>
-# - config options: <https://github.com/drakkan/sftpgo/blob/main/docs/full-configuration.md>
-# - config defaults: <https://github.com/drakkan/sftpgo/blob/main/sftpgo.json>
-# - nixos options: <repo:nixos/nixpkgs:nixos/modules/services/web-apps/sftpgo.nix>
-# - nixos example: <repo:nixos/nixpkgs:nixos/tests/sftpgo.nix>
-#
-# sftpgo is a FTP server that also supports WebDAV, SFTP, and web clients.
-#
-# TODO: change umask so sftpgo-created files default to 644.
-# - it does indeed appear that the 600 is not something sftpgo is explicitly doing.
-
-
-{ config, lib, pkgs, sane-lib, ... }:
-let
-  # user permissions:
-  # - see <repo:drakkan/sftpgo:internal/dataprovider/user.go>
-  # - "*" = grant all permissions
-  # - read-only perms:
-  #   - "list" = list files and directories
-  #   - "download"
-  # - rw perms:
-  #   - "upload"
-  #   - "overwrite" = allow uploads to replace existing files
-  #   - "delete" = delete files and directories
-  #     - "delete_files"
-  #     - "delete_dirs"
-  #   - "rename" = rename files and directories
-  #     - "rename_files"
-  #     - "rename_dirs"
-  #   - "create_dirs"
-  #   - "create_symlinks"
-  #   - "chmod"
-  #   - "chown"
-  #   - "chtimes" = change atime/mtime (access and modification times)
-  #
-  # home_dir:
-  # - it seems (empirically) that a user can't cd above their home directory.
-  #   though i don't have a reference for that in the docs.
-  authResponseSuccess = {
-    status = 1;
-    username = "anonymous";
-    expiration_date = 0;
-    home_dir = "/var/export";
-    # uid/gid 0 means to inherit sftpgo uid.
-    # - i.e. users can't read files which Linux user `sftpgo` can't read
-    # - uploaded files belong to Linux user `sftpgo`
-    # other uid/gid values aren't possible for localfs backend, unless i let sftpgo use `sudo`.
-    uid = 0;
-    gid = 0;
-    # uid = 65534;
-    # gid = 65534;
-    max_sessions = 0;
-    # quota_*: 0 means to not use SFTP's quota system
-    quota_size = 0;
-    quota_files = 0;
-    permissions = {
-      "/" = [ "list" "download" ];
-      "/playground" = [
-        # read-only:
-        "list"
-        "download"
-        # write:
-        "upload"
-        "overwrite"
-        "delete"
-        "rename"
-        "create_dirs"
-        "create_symlinks"
-        # intentionally omitted:
-        # "chmod"
-        # "chown"
-        # "chtimes"
-      ];
-    };
-    upload_bandwidth = 0;
-    download_bandwidth = 0;
-    filters = {
-      allowed_ip = [];
-      denied_ip = [];
-    };
-    public_keys = [];
-    # other fields:
-    # ? groups
-    # ? virtual_folders
-  };
-  authResponseFail = {
-    username = "";
-  };
-  authSuccessJson = pkgs.writeText "sftp-auth-success.json" (builtins.toJSON authResponseSuccess);
-  authFailJson = pkgs.writeText "sftp-auth-fail.json" (builtins.toJSON authResponseFail);
-  unwrappedAuthProgram = pkgs.static-nix-shell.mkBash {
-    pname = "sftpgo_external_auth_hook";
-    src = ./.;
-    pkgs = [ "coreutils" ];
-  };
-  authProgram = pkgs.writeShellScript "sftpgo-auth-hook" ''
-    ${unwrappedAuthProgram}/bin/sftpgo_external_auth_hook ${authFailJson} ${authSuccessJson}
-  '';
-in
-{
-  # Client initiates a FTP "control connection" on port 21.
-  # - this handles the client -> server commands, and the server -> client status, but not the actual data
-  # - file data, directory listings, etc need to be transferred on an ephemeral "data port".
-  # - 50000-50100 is a common port range for this.
-  sane.ports.ports = {
-    "21" = {
-      protocol = [ "tcp" ];
-      visibleTo.lan = true;
-      description = "colin-FTP server";
-    };
-  } // (sane-lib.mapToAttrs
-    (port: {
-      name = builtins.toString port;
-      value = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        description = "colin-FTP server data port range";
-      };
-    })
-    (lib.range 50000 50100)
-  );
-
-  services.sftpgo = {
-    enable = true;
-    group = "export";
-    settings = {
-      ftpd = {
-        bindings = [
-          {
-            # binding this means any wireguard client can connect
-            address = "10.0.10.5";
-            port = 21;
-            debug = true;
-          }
-          {
-            # binding this means any LAN client can connect
-            address = "10.78.79.51";
-            port = 21;
-            debug = true;
-          }
-        ];
-
-        # active mode is susceptible to "bounce attacks", without much benefit over passive mode
-        disable_active_mode = true;
-        hash_support = true;
-        passive_port_range = {
-          start = 50000;
-          end = 50100;
-        };
-
-        banner = ''
-          Welcome, friends, to Colin's read-only FTP server! Also available via NFS on the same host.
-          Username: "anonymous"
-          Password: "anonymous"
-          CONFIGURE YOUR CLIENT FOR "PASSIVE" mode, e.g. `ftp --passive uninsane.org`
-          Please let me know if anything's broken or not as it should be. Otherwise, browse and DL freely :)
-        '';
-
-      };
-      data_provider = {
-        driver = "memory";
-        external_auth_hook = "${authProgram}";
-        # track_quota:
-        # - 0: disable quota tracking
-        # - 1: quota is updated on every upload/delete, even if user has no quota restriction
-        # - 2: quota is updated on every upload/delete, but only if user/folder has a quota restriction  (default, i think)
-        # track_quota = 2;
-      };
-    };
-  };
-
-  users.users.sftpgo.extraGroups = [ "export" ];
-
-  systemd.services.sftpgo.serviceConfig = {
-    ReadOnlyPaths = [ "/var/export" ];
-    ReadWritePaths = [ "/var/export/playground" ];
-    after = [ "network-online.target" ];
-    wants = [ "network-online.target" ];
-
-    Restart = "always";
-    RestartSec = "20s";
-  };
-}
--- a/hosts/by-name/servo/services/export/sftpgo_external_auth_hook
+++ b/hosts/by-name/servo/services/export/sftpgo_external_auth_hook
@@ -1,23 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash -p coreutils
-# vim: set filetype=bash :
-#
-# available environment variables:
-# - SFTPGO_AUTHD_USERNAME
-# - SFTPGO_AUTHD_USER
-# - SFTPGO_AUTHD_IP
-# - SFTPGO_AUTHD_PROTOCOL  = { "DAV", "FTP", "HTTP", "SSH" }
-# - SFTPGO_AUTHD_PASSWORD
-# - SFTPGO_AUTHD_PUBLIC_KEY
-# - SFTPGO_AUTHD_KEYBOARD_INTERACTIVE
-# - SFTPGO_AUTHD_TLS_CERT
-#
-#
-# call with <script_name> /path/to/fail/response.json /path/to/success/response.json
-
-
-if [ "$SFTPGO_AUTHD_USERNAME" = "anonymous" ]; then
-  cat "$2"
-else
-  cat "$1"
-fi
--- a/hosts/by-name/servo/services/freshrss.nix
+++ b/hosts/by-name/servo/services/freshrss.nix
@@ -1,63 +0,0 @@
-# import feeds with e.g.
-# ```console
-# $ nix build '.#nixpkgs.freshrss'
-# $ sudo -u freshrss -g freshrss FRESHRSS_DATA_PATH=/var/lib/freshrss ./result/cli/import-for-user.php --user admin --filename /home/colin/.config/newsflashFeeds.opml
-# ```
-#
-# export feeds with
-# ```console
-# $ sudo -u freshrss -g freshrss FRESHRSS_DATA_PATH=/var/lib/freshrss ./result/cli/export-opml-for-user.php --user admin
-# ```
-
-{ config, lib, pkgs, sane-lib, ... }:
-{
-  sops.secrets."freshrss_passwd" = {
-    owner = config.users.users.freshrss.name;
-    mode = "0400";
-  };
-  sane.persist.sys.byStore.plaintext = [
-    { user = "freshrss"; group = "freshrss"; path = "/var/lib/freshrss"; }
-  ];
-
-  services.freshrss.enable = true;
-  services.freshrss.baseUrl = "https://rss.uninsane.org";
-  services.freshrss.virtualHost = "rss.uninsane.org";
-  services.freshrss.passwordFile = config.sops.secrets.freshrss_passwd.path;
-
-  systemd.services.freshrss-import-feeds =
-  let
-    feeds = sane-lib.feeds;
-    fresh = config.systemd.services.freshrss-config;
-    all-feeds = config.sane.feeds;
-    wanted-feeds = feeds.filterByFormat ["text" "image"] all-feeds;
-    opml = pkgs.writeText "sane-freshrss.opml" (feeds.feedsToOpml wanted-feeds);
-  in {
-    inherit (fresh) wantedBy environment;
-    serviceConfig = {
-      inherit (fresh.serviceConfig) Type User Group StateDirectory WorkingDirectory
-        # hardening options
-        CapabilityBoundingSet DeviceAllow LockPersonality NoNewPrivileges PrivateDevices PrivateTmp PrivateUsers ProcSubset ProtectClock ProtectControlGroups ProtectHome ProtectHostname ProtectKernelLogs ProtectKernelModules ProtectKernelTunables ProtectProc ProtectSystem RemoveIPC RestrictNamespaces RestrictRealtime RestrictSUIDSGID SystemCallArchitectures SystemCallFilter UMask;
-    };
-    description = "import sane RSS feed list";
-    after = [ "freshrss-config.service" ];
-    script = ''
-      # easiest way to preserve feeds: delete the user, recreate it, import feeds
-      ${pkgs.freshrss}/cli/delete-user.php --user colin || true
-      ${pkgs.freshrss}/cli/create-user.php --user colin --password "$(cat ${config.services.freshrss.passwordFile})" || true
-      ${pkgs.freshrss}/cli/import-for-user.php --user colin --filename ${opml}
-    '';
-  };
-
-  # the default ("*:0/5") is to run every 5 minutes.
-  # `systemctl list-timers` to show
-  systemd.services.freshrss-updater.startAt = lib.mkForce "*:3/30";
-
-  services.nginx.virtualHosts."rss.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    # the routing is handled by services.freshrss.virtualHost
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."rss" = "native";
-}
--- a/hosts/by-name/servo/services/goaccess.nix
+++ b/hosts/by-name/servo/services/goaccess.nix
@@ -1,68 +0,0 @@
-{ pkgs, ... }:
-{
-  # based on <https://bytes.fyi/real-time-goaccess-reports-with-nginx/>
-  # log-format setting can be derived with this tool if custom:
-  # - <https://github.com/stockrt/nginx2goaccess>
-  # config options:
-  # - <https://github.com/allinurl/goaccess/blob/master/config/goaccess.conf>
-
-  systemd.services.goaccess = {
-    description = "GoAccess server monitoring";
-    serviceConfig = {
-      ExecStart = ''
-        ${pkgs.goaccess}/bin/goaccess \
-          -f /var/log/nginx/public.log \
-          --log-format=VCOMBINED \
-          --real-time-html \
-          --html-refresh=30 \
-          --no-query-string \
-          --anonymize-ip \
-          --ignore-panel=HOSTS \
-          --ws-url=wss://sink.uninsane.org:443/ws \
-          --port=7890 \
-          -o /var/lib/uninsane/sink/index.html
-      '';
-      ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
-      Type = "simple";
-      Restart = "on-failure";
-      RestartSec = "10s";
-
-      # hardening
-      WorkingDirectory = "/tmp";
-      NoNewPrivileges = true;
-      PrivateTmp = true;
-      ProtectHome = "read-only";
-      ProtectSystem = "strict";
-      SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @privileged @reboot @resources @setuid @swap @raw-io";
-      ReadOnlyPaths = "/";
-      ReadWritePaths = [ "/proc/self" "/var/lib/uninsane/sink" ];
-      PrivateDevices = "yes";
-      ProtectKernelModules = "yes";
-      ProtectKernelTunables = "yes";
-    };
-    after = [ "network.target" ];
-    wantedBy = [ "multi-user.target" ];
-  };
-
-  # server statistics
-  services.nginx.virtualHosts."sink.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    root = "/var/lib/uninsane/sink";
-
-    locations."/ws" = {
-      proxyPass = "http://127.0.0.1:7890";
-      # XXX not sure how much of this is necessary
-      extraConfig = ''
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection $connection_upgrade;
-        proxy_buffering off;
-        proxy_read_timeout 7d;
-      '';
-    };
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."sink" = "native";
-}
--- a/hosts/by-name/servo/services/jackett.nix
+++ b/hosts/by-name/servo/services/jackett.nix
@@ -1,33 +0,0 @@
-{ ... }:
-
-{
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode? we only need this to save Indexer creds ==> migrate to config?
-    { user = "root"; group = "root"; path = "/var/lib/jackett"; }
-  ];
-  services.jackett.enable = true;
-
-  systemd.services.jackett.after = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.jackett.partOf = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.jackett.serviceConfig = {
-    # run this behind the OVPN static VPN
-    NetworkNamespacePath = "/run/netns/ovpns";
-    # patch jackett to listen on the public interfaces
-    # ExecStart = lib.mkForce "${pkgs.jackett}/bin/Jackett --NoUpdates --DataFolder /var/lib/jackett/.config/Jackett --ListenPublic";
-  };
-
-  # jackett torrent search
-  services.nginx.virtualHosts."jackett.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    locations."/" = {
-      # proxyPass = "http://ovpns.uninsane.org:9117";
-      proxyPass = "http://10.0.1.6:9117";
-      recommendedProxySettings = true;
-    };
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."jackett" = "native";
-}
-
--- a/hosts/by-name/servo/services/jellyfin.nix
+++ b/hosts/by-name/servo/services/jellyfin.nix
@@ -1,127 +0,0 @@
-# configuration options (today i don't store my config in nix):
-#
-# - jellyfin-web can be statically configured (result/share/jellyfin-web/config.json)
-#   - <https://jellyfin.org/docs/general/clients/web-config>
-#   - configure server list, plugins, "menuLinks", colors
-#
-# - jellfyin server is configured in /var/lib/jellfin/
-#   - root/default/<LibraryType>/
-#     - <LibraryName>.mblink: contains the directory name where this library lives
-#     - options.xml: contains preferences which were defined in the web UI during import
-#       - e.g. `EnablePhotos`, `EnableChapterImageExtraction`, etc.
-#   - config/encoding.xml: transcoder settings
-#   - config/system.xml: misc preferences like log file duration, audiobook resume settings, etc.
-#   - data/jellyfin.db: maybe account definitions? internal state?
-
-{ config, lib, ... }:
-
-{
-  # https://jellyfin.org/docs/general/networking/index.html
-  sane.ports.ports."1900" = {
-    protocol = [ "udp" ];
-    visibleTo.lan = true;
-    description = "colin-upnp-for-jellyfin";
-  };
-  sane.ports.ports."7359" = {
-    protocol = [ "udp" ];
-    visibleTo.lan = true;
-    description = "colin-jellyfin-specific-client-discovery";
-    # ^ not sure if this is necessary: copied this port from nixos jellyfin.openFirewall
-  };
-  # not sure if 8096/8920 get used either:
-  sane.ports.ports."8096" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    description = "colin-jellyfin-http-lan";
-  };
-  sane.ports.ports."8920" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    description = "colin-jellyfin-https-lan";
-  };
-
-  sane.persist.sys.byStore.plaintext = [
-    { user = "jellyfin"; group = "jellyfin"; mode = "0700"; path = "/var/lib/jellyfin"; }
-  ];
-  sane.fs."/var/lib/jellyfin/config/logging.json" = {
-    # "Emby.Dlna" logging: <https://jellyfin.org/docs/general/networking/dlna>
-    symlink.text = ''
-      {
-        "Serilog": {
-          "MinimumLevel": {
-            "Default": "Information",
-            "Override": {
-              "Microsoft": "Warning",
-              "System": "Warning",
-              "Emby.Dlna": "Debug",
-              "Emby.Dlna.Eventing": "Debug"
-            }
-          },
-          "WriteTo": [
-            {
-              "Name": "Console",
-              "Args": {
-                "outputTemplate": "[{Timestamp:HH:mm:ss}] [{Level:u3}] [{ThreadId}] {SourceContext}: {Message:lj}{NewLine}{Exception}"
-              }
-            }
-          ],
-          "Enrich": [ "FromLogContext", "WithThreadId" ]
-        }
-      }
-    '';
-    wantedBeforeBy = [ "jellyfin.service" ];
-  };
-
-  # Jellyfin multimedia server
-  # this is mostly taken from the official jellfin.org docs
-  services.nginx.virtualHosts."jelly.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-
-    locations."/" = {
-      proxyPass = "http://127.0.0.1:8096";
-      extraConfig = ''
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_set_header X-Forwarded-Protocol $scheme;
-        proxy_set_header X-Forwarded-Host $http_host;
-
-        # Disable buffering when the nginx proxy gets very resource heavy upon streaming
-        proxy_buffering off;
-      '';
-    };
-    # locations."/web/" = {
-    #   proxyPass = "http://127.0.0.1:8096/web/index.html";
-    #   extraConfig = ''
-    #     proxy_set_header Host $host;
-    #     proxy_set_header X-Real-IP $remote_addr;
-    #     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    #     proxy_set_header X-Forwarded-Proto $scheme;
-    #     proxy_set_header X-Forwarded-Protocol $scheme;
-    #     proxy_set_header X-Forwarded-Host $http_host;
-    #   '';
-    # };
-    locations."/socket" = {
-      proxyPass = "http://127.0.0.1:8096";
-      extraConfig = ''
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection "upgrade";
-
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_set_header X-Forwarded-Protocol $scheme;
-        proxy_set_header X-Forwarded-Host $http_host;
-      '';
-    };
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."jelly" = "native";
-
-  services.jellyfin.enable = true;
-}
--- a/hosts/by-name/servo/services/kiwix-serve.nix
+++ b/hosts/by-name/servo/services/kiwix-serve.nix
@@ -1,17 +0,0 @@
-{ ... }:
-{
-  sane.services.kiwix-serve = {
-    enable = true;
-    port = 8013;
-    zimPaths = [ "/var/lib/uninsane/www-archive/wikipedia_en_all_maxi_2022-05.zim" ];
-  };
-
-  services.nginx.virtualHosts."w.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    locations."/".proxyPass = "http://127.0.0.1:8013";
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."w" = "native";
-}
--- a/hosts/by-name/servo/services/komga.nix
+++ b/hosts/by-name/servo/services/komga.nix
@@ -1,22 +0,0 @@
-{ config, ... }:
-let
-  svc-cfg = config.services.komga;
-  inherit (svc-cfg) user group port stateDir;
-in
-{
-  sane.persist.sys.byStore.plaintext = [
-    { inherit user group; mode = "0700"; path = stateDir; }
-  ];
-
-  services.komga.enable = true;
-  services.komga.port = 11319;  # chosen at random
-
-  services.nginx.virtualHosts."komga.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    locations."/" = {
-      proxyPass = "http://127.0.0.1:${builtins.toString port}";
-    };
-  };
-  sane.dns.zones."uninsane.org".inet.CNAME."komga" = "native";
-}
--- a/hosts/by-name/servo/services/lemmy.nix
+++ b/hosts/by-name/servo/services/lemmy.nix
@@ -1,85 +0,0 @@
-# docs:
-# - <repo:LemmyNet/lemmy:docker/federation/nginx.conf>
-# - <repo:LemmyNet/lemmy:docker/nginx.conf>
-# - <repo:LemmyNet/lemmy-ansible:templates/nginx.conf>
-
-{ config, lib, pkgs, ... }:
-let
-  inherit (builtins) toString;
-  inherit (lib) mkForce;
-  uiPort = 1234;  # default ui port is 1234
-  backendPort = 8536; # default backend port is 8536
-  #^ i guess the "backend" port is used for federation?
-  pict-rs = pkgs.pict-rs.overrideAttrs (upstream: {
-    # as of v 0.4.2, all non-GIF video is forcibly transcoded.
-    # that breaks lemmy, because of the request latency.
-    # and it eats up hella CPU.
-    # pict-rs is iffy around video altogether: mp4 seems the best supported.
-    postPatch = (upstream.postPatch or "") + ''
-      substituteInPlace src/validate.rs \
-        --replace 'if transcode_options.needs_reencode() {' 'if false {'
-    '';
-  });
-in {
-  services.lemmy = {
-    enable = true;
-    settings.hostname = "lemmy.uninsane.org";
-    # federation.debug forces outbound federation queries to be run synchronously
-    # N.B.: this option might not be read for 0.17.0+? <https://github.com/LemmyNet/lemmy/blob/c32585b03429f0f76d1e4ff738786321a0a9df98/RELEASES.md#upgrade-instructions>
-    # settings.federation.debug = true;
-    settings.port = backendPort;
-    ui.port = uiPort;
-    database.createLocally = true;
-    nginx.enable = true;
-  };
-
-  systemd.services.lemmy.serviceConfig = {
-    # fix to use a normal user so we can configure perms correctly
-    DynamicUser = mkForce false;
-    User = "lemmy";
-    Group = "lemmy";
-  };
-  systemd.services.lemmy.environment = {
-    RUST_BACKTRACE = "full";
-    # RUST_LOG = "debug";
-    # RUST_LOG = "trace";
-    # upstream defaults LEMMY_DATABASE_URL = "postgres:///lemmy?host=/run/postgresql";
-    # - Postgres complains that we didn't specify a user
-    # lemmy formats the url as:
-    # - postgres://{user}:{password}@{host}:{port}/{database}
-    # SO suggests (https://stackoverflow.com/questions/3582552/what-is-the-format-for-the-postgresql-connection-string-url):
-    # - postgresql://[user[:password]@][netloc][:port][/dbname][?param1=value1&...]
-    # LEMMY_DATABASE_URL = "postgres://lemmy@/run/postgresql";  # connection to server on socket "/run/postgresql/.s.PGSQL.5432" failed: FATAL:  database "run/postgresql" does not exist
-    # LEMMY_DATABASE_URL = "postgres://lemmy?host=/run/postgresql";  # no PostgreSQL user name specified in startup packet
-    # LEMMY_DATABASE_URL = mkForce "postgres://lemmy@?host=/run/postgresql";  # WORKS
-    LEMMY_DATABASE_URL = mkForce "postgres://lemmy@/lemmy?host=/run/postgresql";
-  };
-  users.groups.lemmy = {};
-  users.users.lemmy = {
-    group = "lemmy";
-    isSystemUser = true;
-  };
-
-  services.nginx.virtualHosts."lemmy.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."lemmy" = "native";
-
-  #v DO NOT REMOVE: defaults to 0.3, instead of latest, so always need to explicitly set this.
-  services.pict-rs.package = pict-rs;
-
-  # pict-rs configuration is applied in this order:
-  # - via toml
-  # - via env vars (overrides everything above)
-  # - via CLI flags (overrides everything above)
-  # some of the CLI flags have defaults, making it the only actual way to configure certain things even when docs claim otherwise.
-  # CLI args: <https://git.asonix.dog/asonix/pict-rs#user-content-running>
-  systemd.services.pict-rs.serviceConfig.ExecStart = lib.mkForce (lib.concatStringsSep " " [
-    "${lib.getBin pict-rs}/bin/pict-rs run"
-    "--media-max-frame-count" (builtins.toString (30*60*60))
-    "--media-process-timeout 120"
-    "--media-enable-full-video true"  # allow audio
-  ]);
-}
--- a/hosts/by-name/servo/services/matrix/default.nix
+++ b/hosts/by-name/servo/services/matrix/default.nix
@@ -1,165 +0,0 @@
-# docs: <https://nixos.wiki/wiki/Matrix>
-# docs: <https://nixos.org/manual/nixos/stable/index.html#module-services-matrix-synapse>
-# example config: <https://github.com/matrix-org/synapse/blob/develop/docs/sample_config.yaml>
-#
-# ENABLING PUSH NOTIFICATIONS (with UnifiedPush/ntfy):
-# - Matrix "pushers" API spec: <https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3pushersset>
-# - first, view notification settings:
-#   - obtain your client's auth token. e.g. Element -> profile -> help/about -> access token.
-#   - `curl --header 'Authorization: Bearer <your_access_token>' localhost:8008/_matrix/client/v3/pushers | jq .`
-# - enable a new notification destination:
-#   - `curl --header "Authorization: Bearer <your_access_token>" --data '{ "app_display_name": "<topic>", "app_id": "ntfy.uninsane.org", "data": { "url": "https://ntfy.uninsane.org/_matrix/push/v1/notify", "format": "event_id_only" }, "device_display_name": "<topic>", "kind": "http", "lang": "en-US", "profile_tag": "", "pushkey": "<topic>" }' localhost:8008/_matrix/client/v3/pushers/set`
-# - delete a notification destination by setting `kind` to `null` (otherwise, request is identical to above)
-#
-{ config, lib, pkgs, ... }:
-
-{
-  imports = [
-    ./discord-puppet.nix
-    ./irc.nix
-    ./signal.nix
-  ];
-
-  sane.persist.sys.byStore.plaintext = [
-    { user = "matrix-synapse"; group = "matrix-synapse"; path = "/var/lib/matrix-synapse"; }
-  ];
-  services.matrix-synapse.enable = true;
-  services.matrix-synapse.settings = {
-    # this changes the default log level from INFO to WARN.
-    # maybe there's an easier way?
-    log_config = ./synapse-log_level.yaml;
-    server_name = "uninsane.org";
-
-    # services.matrix-synapse.enable_registration_captcha = true;
-    # services.matrix-synapse.enable_registration_without_verification = true;
-    enable_registration = true;
-    # services.matrix-synapse.registration_shared_secret = "<shared key goes here>";
-
-    # default for listeners is port = 8448, tls = true, x_forwarded = false.
-    # we change this because the server is situated behind nginx.
-    listeners = [
-      {
-        port = 8008;
-        bind_addresses = [ "127.0.0.1" ];
-        type = "http";
-        tls = false;
-        x_forwarded = true;
-        resources = [
-          {
-            names = [ "client" "federation" ];
-            compress = false;
-          }
-        ];
-      }
-    ];
-
-    ip_range_whitelist = [
-      # to communicate with ntfy.uninsane.org push notifs.
-      # TODO: move this to some non-shared loopback device: we don't want Matrix spouting http requests to *anything* on this machine
-      "10.78.79.51"
-    ];
-
-    x_forwarded = true;  # because we proxy matrix behind nginx
-    max_upload_size = "100M";  # default is "50M"
-
-    admin_contact = "admin.matrix@uninsane.org";
-    registrations_require_3pid = [ "email" ];
-  };
-
-  services.matrix-synapse.extraConfigFiles = [
-    config.sops.secrets."matrix_synapse_secrets.yaml".path
-  ];
-
-  systemd.services.matrix-synapse.postStart = ''
-    ACCESS_TOKEN=$(${pkgs.coreutils}/bin/cat ${config.sops.secrets.matrix_access_token.path})
-    TOPIC=$(${pkgs.coreutils}/bin/cat ${config.sops.secrets.ntfy-sh-topic.path})
-
-    echo "ensuring ntfy push gateway"
-    ${pkgs.curl}/bin/curl \
-      --header "Authorization: Bearer $ACCESS_TOKEN" \
-      --data "{ \"app_display_name\": \"ntfy-adapter\", \"app_id\": \"ntfy.uninsane.org\", \"data\": { \"url\": \"https://ntfy.uninsane.org/_matrix/push/v1/notify\", \"format\": \"event_id_only\" }, \"device_display_name\": \"ntfy-adapter\", \"kind\": \"http\", \"lang\": \"en-US\", \"profile_tag\": \"\", \"pushkey\": \"$TOPIC\" }" \
-      localhost:8008/_matrix/client/v3/pushers/set
-
-    echo "registered push gateways:"
-    ${pkgs.curl}/bin/curl \
-      --header "Authorization: Bearer $ACCESS_TOKEN" \
-      localhost:8008/_matrix/client/v3/pushers \
-      | ${pkgs.jq}/bin/jq .
-  '';
-
-
-  # new users may be registered on the CLI:
-  #   register_new_matrix_user -c /nix/store/8n6kcka37jhmi4qpd2r03aj71pkyh21s-homeserver.yaml http://localhost:8008
-  #
-  # or provide an registration token then can use to register through the client.
-  #   docs: https://github.com/matrix-org/synapse/blob/develop/docs/usage/administration/admin_api/registration_tokens.md
-  # first, grab your own user's access token (Help & About section in Element). then:
-  #   curl --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens
-  # create a token with unlimited uses:
-  #   curl -d '{}' --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens/new
-  # create a token with limited uses:
-  #   curl -d '{ "uses_allowed": 1 }' --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens/new
-
-  # matrix chat server
-  # TODO: was `publog`
-  services.nginx.virtualHosts."matrix.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-
-    # TODO colin: replace this with something helpful to the viewer
-    # locations."/".extraConfig = ''
-    #   return 404;
-    # '';
-
-    locations."/" = {
-      proxyPass = "http://127.0.0.1:8008";
-      extraConfig = ''
-        # allow uploading large files (matrix enforces a separate limit, downstream)
-        client_max_body_size  512m;
-      '';
-    };
-    # redirect browsers to the web client.
-    # i don't think native matrix clients ever fetch the root.
-    # ideally this would be put behind some user-agent test though.
-    locations."= /" = {
-      return = "301 https://web.matrix.uninsane.org";
-    };
-
-    # locations."/_matrix" = {
-    #   proxyPass = "http://127.0.0.1:8008";
-    # };
-  };
-
-  # matrix web client
-  # docs: https://nixos.org/manual/nixos/stable/index.html#module-services-matrix-element-web
-  services.nginx.virtualHosts."web.matrix.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-
-    root = pkgs.element-web.override {
-      conf = {
-        default_server_config."m.homeserver" = {
-          "base_url" = "https://matrix.uninsane.org";
-          "server_name" = "uninsane.org";
-        };
-      };
-    };
-  };
-
-  sane.dns.zones."uninsane.org".inet = {
-    CNAME."matrix" = "native";
-    CNAME."web.matrix" = "native";
-  };
-
-
-  sops.secrets."matrix_synapse_secrets.yaml" = {
-    owner = config.users.users.matrix-synapse.name;
-  };
-  sops.secrets."matrix_access_token" = {
-    owner = config.users.users.matrix-synapse.name;
-  };
-  # provide access to ntfy-sh-topic secret
-  users.users.matrix-synapse.extraGroups = [ "ntfy-sh" ];
-}
--- a/hosts/by-name/servo/services/matrix/irc-no-reveal-bridge.patch
+++ b/hosts/by-name/servo/services/matrix/irc-no-reveal-bridge.patch
@@ -1,13 +0,0 @@
-diff --git a/src/irc/ConnectionInstance.ts b/src/irc/ConnectionInstance.ts
-index 688036ca..3373fa27 100644
--- a/src/irc/ConnectionInstance.ts
-+++ b/src/irc/ConnectionInstance.ts
-@@ -149,7 +149,7 @@ export class ConnectionInstance {
-         if (this.dead) {
-             return Promise.resolve();
-         }
-        ircReason = ircReason || reason;
-+        ircReason = "bye"; // don't reveal through the IRC quit message that we're a bridge
-         log.info(
-             "disconnect()ing %s@%s - %s", this.nick, this.domain, reason
-         );
--- a/hosts/by-name/servo/services/matrix/irc-no-reveal-mxid.patch
+++ b/hosts/by-name/servo/services/matrix/irc-no-reveal-mxid.patch
@@ -1,50 +0,0 @@
-diff --git a/config.schema.yml b/config.schema.yml
-index 2e71c8d6..42ba8ba1 100644
--- a/config.schema.yml
-+++ b/config.schema.yml
-@@ -433,7 +433,7 @@ properties:
-                                     type: "boolean"
-                                 realnameFormat:
-                                     type: "string"
-                                    enum: ["mxid","reverse-mxid"]
-+                                    enum: ["mxid","reverse-mxid","localpart"]
-                                 ipv6:
-                                     type: "object"
-                                     properties:
-diff --git a/src/irc/IdentGenerator.ts b/src/irc/IdentGenerator.ts
-index 7a2b5cf1..50f7815a 100644
--- a/src/irc/IdentGenerator.ts
-+++ b/src/irc/IdentGenerator.ts
-@@ -74,6 +74,9 @@ export class IdentGenerator {
-         else if (server.getRealNameFormat() === "reverse-mxid") {
-             realname = IdentGenerator.sanitiseRealname(IdentGenerator.switchAroundMxid(matrixUser));
-         }
-+        else if (server.getRealNameFormat() == "localpart") {
-+            realname = IdentGenerator.sanitiseRealname(matrixUser.localpart);
-+        }
-         else {
-             throw Error('Invalid value for realNameFormat');
-         }
-diff --git a/src/irc/IrcServer.ts b/src/irc/IrcServer.ts
-index 2af73ab4..895b9783 100644
--- a/src/irc/IrcServer.ts
-+++ b/src/irc/IrcServer.ts
-@@ -101,7 +101,7 @@ export interface IrcServerConfig {
-         };
-         lineLimit: number;
-         userModes?: string;
-        realnameFormat?: "mxid"|"reverse-mxid";
-+        realnameFormat?: "mxid"|"reverse-mxid"|"localpart";
-         pingTimeoutMs: number;
-         pingRateMs: number;
-         kickOn: {
-@@ -289,7 +289,7 @@ export class IrcServer {
-         return this.config.ircClients.userModes || "";
-     }
- 
-    public getRealNameFormat(): "mxid"|"reverse-mxid" {
-+    public getRealNameFormat(): "mxid"|"reverse-mxid"|"localpart" {
-         return this.config.ircClients.realnameFormat || "mxid";
-     }
- 
-
--- a/hosts/by-name/servo/services/matrix/irc.nix
+++ b/hosts/by-name/servo/services/matrix/irc.nix
@@ -1,168 +0,0 @@
-# config docs:
-# - <https://github.com/matrix-org/matrix-appservice-irc/blob/develop/config.sample.yaml>
-#       probably want to remove that.
-{ config, lib, ... }:
-
-let
-  ircServer = { name, additionalAddresses ? [], sasl ? true, port ? 6697 }: let
-    lowerName = lib.toLower name;
-  in {
-    # XXX sasl: appservice doesn't support NickServ identification (only SASL, or PASS if sasl = false)
-    inherit name additionalAddresses sasl port;
-    ssl = true;
-    botConfig = {
-      # bot has no presence in IRC channel; only real Matrix users
-      enabled = false;
-      # this is the IRC username/nickname *of the bot* (not visible in channels): not of the end-user.
-      # the irc username/nick of a mapped Matrix user is determined further down in `ircClients` section.
-      # if `enabled` is false, then this name probably never shows up on the IRC side (?)
-      nick = "uninsane";
-      username = "uninsane";
-      joinChannelsIfNoUsers = false;
-    };
-    dynamicChannels = {
-      enabled = true;
-      aliasTemplate = "#irc_${lowerName}_$CHANNEL";
-      published = false;  # false => irc rooms aren't listed in homeserver public rooms list
-      federate = false;  # false => Matrix users from other homeservers can't join IRC channels
-    };
-    ircClients = {
-      nickTemplate = "$LOCALPARTsane";  # @colin:uninsane.org (Matrix) -> colinsane (IRC)
-      realnameFormat = "reverse-mxid";  # @colin:uninsane.org (Matrix) -> org.uninsane:colin (IRC)
-      # realnameFormat = "localpart";  # @colin:uninsane.org (Matrix) -> colin (IRC)  -- but requires the mxid patch below
-      # by default, Matrix will convert messages greater than (3) lines into a pastebin-like URL to send to IRC.
-      lineLimit = 20;
-      # Rizon in particular allows only 4 connections from one IP before a 30min ban.
-      # that's effectively reduced to 2 during a netsplit, or maybe during a restart.
-      #   - https://wiki.rizon.net/index.php?title=Connection/Session_Limit_Exemptions
-      # especially, misconfigurations elsewhere in this config may cause hundreds of connections
-      # so this is a safeguard.
-      maxClients = 2;
-      # don't have the bridge disconnect me from IRC when idle.
-      idleTimeout = 0;
-      concurrentReconnectLimit = 2;
-      reconnectIntervalMs = 60000;
-      kickOn = {
-        # remove Matrix user from room when...
-        channelJoinFailure = false;
-        ircConnectionFailure = false;
-        userQuit = true;
-      };
-    };
-    matrixClients = {
-      userTemplate = "@irc_${lowerName}_$NICK";  # the :uninsane.org part is appended automatically
-    };
-
-    # this will let this user message the appservice with `!join #<IRCChannel>` and the rest "Just Works"
-    "@colin:uninsane.org" = "admin";
-
-    membershipLists = {
-      enabled = true;
-      global = {
-        ircToMatrix = {
-          initial = true;
-          incremental = true;
-          requireMatrixJoined = false;
-        };
-        matrixToIrc = {
-          initial = true;
-          incremental = true;
-        };
-      };
-      ignoreIdleUsersOnStartup = {
-        enabled = false;  # false => always bridge users, even if idle
-      };
-    };
-    # sync room description?
-    bridgeInfoState = {
-      enabled = true;
-      initial = true;
-    };
-
-    # for per-user IRC password:
-    # - invite @irc_${lowerName}_NickServ:uninsane.org to a DM and type `help`  => register
-    # - invite the matrix-appservice-irc user to a DM and type `!help`   => add PW to database
-    # to validate that i'm authenticated on the IRC network, DM @irc_${lowerName}_NickServ:uninsane.org:
-    # - send: `STATUS colinsane`
-    # - response should be `3`: "user recognized as owner via password identification"
-    # passwordEncryptionKeyPath = "/path/to/privkey";  # appservice will generate its own if unspecified
-  };
-in
-{
-
-  nixpkgs.overlays = [
-    (next: prev: {
-      matrix-appservice-irc = prev.matrix-appservice-irc.overrideAttrs (super: {
-        patches = super.patches or [] ++ [
-          ./irc-no-reveal-bridge.patch
-          # ./irc-no-reveal-mxid.patch
-        ];
-      });
-    })
-  ];
-
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode?
-    { user = "matrix-appservice-irc"; group = "matrix-appservice-irc"; path = "/var/lib/matrix-appservice-irc"; }
-  ];
-
-  # XXX: matrix-appservice-irc PreStart tries to chgrp the registration.yml to matrix-synapse,
-  # which requires matrix-appservice-irc to be of that group
-  users.users.matrix-appservice-irc.extraGroups = [ "matrix-synapse" ];
-  # weird race conditions around registration.yml mean we want matrix-synapse to be of matrix-appservice-irc group too.
-  users.users.matrix-synapse.extraGroups = [ "matrix-appservice-irc" ];
-
-  services.matrix-synapse.settings.app_service_config_files = [
-    "/var/lib/matrix-appservice-irc/registration.yml"  # auto-created by irc appservice
-  ];
-
-  services.matrix-appservice-irc.enable = true;
-  services.matrix-appservice-irc.registrationUrl = "http://127.0.0.1:8009";
-  services.matrix-appservice-irc.settings = {
-    homeserver = {
-      url = "http://127.0.0.1:8008";
-      dropMatrixMessagesAfterSecs = 300;
-      domain = "uninsane.org";
-      enablePresence = true;
-      bindPort = 9999;
-      bindHost = "127.0.0.1";
-    };
-
-    ircService = {
-      servers = {
-        "irc.esper.net" = ircServer {
-          name = "esper";
-          sasl = false;
-          # notable channels:
-          # - #merveilles
-        };
-        "irc.libera.chat" = ircServer {
-          name = "libera";
-          sasl = false;
-          # notable channels:
-          # - #hare
-          # - #mnt-reform
-        };
-        "irc.myanonamouse.net" = ircServer {
-          name = "MyAnonamouse";
-          additionalAddresses = [ "irc2.myanonamouse.net" ];
-          sasl = false;
-        };
-        "irc.oftc.net" = ircServer {
-          name = "oftc";
-          sasl = false;
-          # notable channels:
-          # - #sxmo
-          # - #sxmo-offtopic
-        };
-        "irc.rizon.net" = ircServer { name = "Rizon"; };
-      };
-    };
-  };
-
-  systemd.services.matrix-appservice-irc.serviceConfig = {
-    # XXX 2023/06/20: nixos specifies this + @aio and @memlock as forbidden
-    # the service actively uses at least one of these, and both of them are fairly innocuous
-    SystemCallFilter = lib.mkForce "~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io @setuid @swap";
-  };
-}
--- a/hosts/by-name/servo/services/matrix/signal.nix
+++ b/hosts/by-name/servo/services/matrix/signal.nix
@@ -1,37 +0,0 @@
-# config options:
-# - <https://github.com/mautrix/signal/blob/master/mautrix_signal/example-config.yaml>
-{ config, pkgs, ... }:
-{
-  sane.persist.sys.byStore.plaintext = [
-    { user = "mautrix-signal"; group = "mautrix-signal"; path = "/var/lib/mautrix-signal"; }
-    { user = "signald"; group = "signald"; path = "/var/lib/signald"; }
-  ];
-
-  # allow synapse to read the registration file
-  users.users.matrix-synapse.extraGroups = [ "mautrix-signal" ];
-
-  services.signald.enable = true;
-  services.mautrix-signal.enable = true;
-  services.mautrix-signal.environmentFile =
-    config.sops.secrets.mautrix_signal_env.path;
-
-  services.mautrix-signal.settings.signal.socket_path = "/run/signald/signald.sock";
-  services.mautrix-signal.settings.homeserver.domain = "uninsane.org";
-  services.mautrix-signal.settings.bridge.permissions."@colin:uninsane.org" = "admin";
-  services.matrix-synapse.settings.app_service_config_files = [
-    # auto-created by mautrix-signal service
-    "/var/lib/mautrix-signal/signal-registration.yaml"
-  ];
-
-  systemd.services.mautrix-signal.serviceConfig = {
-    # allow communication to signald
-    SupplementaryGroups = [ "signald" ];
-    ReadWritePaths = [ "/run/signald" ];
-  };
-
-  sops.secrets."mautrix_signal_env" = {
-    mode = "0440";
-    owner = config.users.users.mautrix-signal.name;
-    group = config.users.users.matrix-synapse.name;
-  };
-}
--- a/hosts/by-name/servo/services/navidrome.nix
+++ b/hosts/by-name/servo/services/navidrome.nix
@@ -1,40 +0,0 @@
-{ lib, ... }:
-
-{
-  sane.persist.sys.byStore.plaintext = [
-    { user = "navidrome"; group = "navidrome"; path = "/var/lib/navidrome"; }
-  ];
-  services.navidrome.enable = true;
-  services.navidrome.settings = {
-    # docs: https://www.navidrome.org/docs/usage/configuration-options/
-    Address = "127.0.0.1";
-    Port = 4533;
-    MusicFolder = "/var/lib/uninsane/media/Music";
-    CovertArtPriority = "*.jpg, *.JPG, *.png, *.PNG, embedded";
-    AutoImportPlaylists = false;
-    ScanSchedule = "@every 1h";
-  };
-
-  systemd.services.navidrome.serviceConfig = {
-    # fix to use a normal user so we can configure perms correctly
-    DynamicUser = lib.mkForce false;
-    User = "navidrome";
-    Group = "navidrome";
-  };
-
-  users.groups.navidrome = {};
-
-  users.users.navidrome = {
-    group = "navidrome";
-    isSystemUser = true;
-  };
-
-  services.nginx.virtualHosts."music.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    locations."/".proxyPass = "http://127.0.0.1:4533";
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."music" = "native";
-}
--- a/hosts/by-name/servo/services/nginx.nix
+++ b/hosts/by-name/servo/services/nginx.nix
@@ -1,180 +0,0 @@
-# docs: <https://nixos.wiki/wiki/Nginx>
-# docs: <https://nginx.org/en/docs/>
-{ config, lib, pkgs, ... }:
-
-let
-  # make the logs for this host "public" so that they show up in e.g. metrics
-  publog = vhost: lib.attrsets.unionOfDisjoint vhost {
-    extraConfig = (vhost.extraConfig or "") + ''
-      access_log /var/log/nginx/public.log vcombined;
-    '';
-  };
-
-  # kTLS = true;  # in-kernel TLS for better perf
-in
-{
-
-  sane.ports.ports."80" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    visibleTo.ovpn = true;  # so that letsencrypt can procure a cert for the mx record
-    description = "colin-http-uninsane.org";
-  };
-  sane.ports.ports."443" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-https-uninsane.org";
-  };
-
-  services.nginx.enable = true;
-  services.nginx.appendConfig = ''
-    # use 1 process per core.
-    # may want to increase worker_connections too, but `ulimit -n` must be increased first.
-    worker_processes auto;
-  '';
-
-  # this is the standard `combined` log format, with the addition of $host
-  # so that we have the virtualHost in the log.
-  # KEEP IN SYNC WITH GOACCESS
-  # goaccess calls this VCOMBINED:
-  # - <https://gist.github.com/jyap808/10570005>
-  services.nginx.commonHttpConfig = ''
-    log_format vcombined '$host:$server_port $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referrer" "$http_user_agent"';
-    access_log /var/log/nginx/private.log vcombined;
-  '';
-  # sets gzip_comp_level = 5
-  services.nginx.recommendedGzipSettings = true;
-  # enables OCSP stapling (so clients don't need contact the OCSP server -- i do instead)
-  # - doesn't seem to, actually: <https://www.ssllabs.com/ssltest/analyze.html?d=uninsane.org>
-  # caches TLS sessions for 10m
-  services.nginx.recommendedTlsSettings = true;
-  # enables sendfile, tcp_nopush, tcp_nodelay, keepalive_timeout 65
-  services.nginx.recommendedOptimisation = true;
-
-  # web blog/personal site
-  services.nginx.virtualHosts."uninsane.org" = publog {
-    root = "${pkgs.uninsane-dot-org}/share/uninsane-dot-org";
-    # a lot of places hardcode https://uninsane.org,
-    # and then when we mix http + non-https, we get CORS violations
-    # and things don't look right. so force SSL.
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    # for OCSP stapling
-    sslTrustedCertificate = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
-
-    # uninsane.org/share/foo => /var/lib/uninsane/root/share/foo.
-    # yes, nginx does not strip the prefix when evaluating against the root.
-    locations."/share".root = "/var/lib/uninsane/root";
-
-    # allow matrix users to discover that @user:uninsane.org is reachable via matrix.uninsane.org
-    locations."= /.well-known/matrix/server".extraConfig =
-      let
-        # use 443 instead of the default 8448 port to unite
-        # the client-server and server-server port for simplicity
-        server = { "m.server" = "matrix.uninsane.org:443"; };
-      in ''
-        add_header Content-Type application/json;
-        return 200 '${builtins.toJSON server}';
-      '';
-    locations."= /.well-known/matrix/client".extraConfig =
-      let
-        client = {
-          "m.homeserver" =  { "base_url" = "https://matrix.uninsane.org"; };
-          "m.identity_server" =  { "base_url" = "https://vector.im"; };
-        };
-      # ACAO required to allow element-web on any URL to request this json file
-      in ''
-        add_header Content-Type application/json;
-        add_header Access-Control-Allow-Origin *;
-        return 200 '${builtins.toJSON client}';
-      '';
-
-    # static URLs might not be aware of .well-known (e.g. registration confirmation URLs),
-    # so hack around that.
-    locations."/_matrix" = {
-      proxyPass = "http://127.0.0.1:8008";
-    };
-    locations."/_synapse" = {
-      proxyPass = "http://127.0.0.1:8008";
-    };
-
-    # allow ActivityPub clients to discover how to reach @user@uninsane.org
-    # see: https://git.pleroma.social/pleroma/pleroma/-/merge_requests/3361/
-    # not sure this makes sense while i run multiple AP services (pleroma, lemmy)
-    # locations."/.well-known/nodeinfo" = {
-    #   proxyPass = "http://127.0.0.1:4000";
-    #   extraConfig = pleromaExtraConfig;
-    # };
-  };
-
-
-  # serve any site not listed above, if it's static.
-  # because we define it dynamically, SSL isn't trivial. support only http
-  # documented <https://nginx.org/en/docs/http/ngx_http_core_module.html#server_name>
-  services.nginx.virtualHosts."~^(?<domain>.+)$" = {
-    default = true;
-    addSSL = true;
-    enableACME = false;
-    sslCertificate = "/var/www/certs/wildcard/cert.pem";
-    sslCertificateKey = "/var/www/certs/wildcard/key.pem";
-    # sslCertificate = "/var/lib/acme/.minica/cert.pem";
-    # sslCertificateKey = "/var/lib/acme/.minica/key.pem";
-    # serverName = null;
-    locations."/" = {
-      # somehow this doesn't escape -- i get error 400 if i:
-      # curl 'http://..' --resolve '..:80:127.0.0.1'
-      root = "/var/www/sites/$domain";
-      # tryFiles = "$domain/$uri $domain/$uri/ =404";
-    };
-  };
-
-  security.acme.acceptTerms = true;
-  security.acme.defaults.email = "admin.acme@uninsane.org";
-
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode?
-    { user = "acme"; group = "acme"; path = "/var/lib/acme"; }
-    { user = "colin"; group = "users"; path = "/var/www/sites"; }
-  ];
-
-  # let's encrypt default chain looks like:
-  # - End-entity certificate ← R3 ← ISRG Root X1 ← DST Root CA X3
-  # - <https://community.letsencrypt.org/t/production-chain-changes/150739>
-  # DST Root CA X3 expired in 2021 (?)
-  # the alternative chain is:
-  # - End-entity certificate ← R3 ← ISRG Root X1 (self-signed)
-  # using this alternative chain grants more compatibility for services like ejabberd
-  # but might decrease compatibility with very old clients that don't get updates (e.g. old android, iphone <= 4).
-  # security.acme.defaults.extraLegoFlags = [
-  security.acme.certs."uninsane.org" = rec {
-    # ISRG Root X1 results in lets encrypt sending the same chain as default,
-    # just without the final ISRG Root X1 ← DST Root CA X3 link.
-    # i.e. we could alternative clip the last item and achieve the exact same thing.
-    extraLegoRunFlags = [
-      "--preferred-chain" "ISRG Root X1"
-    ];
-    extraLegoRenewFlags = extraLegoRunFlags;
-  };
-  # TODO: alternatively, we could clip the last cert IF it's expired,
-  # optionally outputting that to a new cert file.
-  # security.acme.defaults.postRun = "";
-
-  # create a self-signed SSL certificate for use with literally any domain.
-  # browsers will reject this, but proxies and local testing tools can be configured
-  # to accept it.
-  system.activationScripts.generate-x509-self-signed.text = ''
-    mkdir -p /var/www/certs/wildcard
-    test -f /var/www/certs/wildcard/key.pem || ${pkgs.openssl}/bin/openssl \
-      req -x509 -newkey rsa:4096 \
-      -keyout /var/www/certs/wildcard/key.pem \
-      -out /var/www/certs/wildcard/cert.pem \
-      -sha256 -nodes -days 3650 \
-      -addext 'subjectAltName=DNS:*' \
-      -subj '/CN=self-signed'
-    chmod 640 /var/www/certs/wildcard/{key,cert}.pem
-    chown root:nginx /var/www/certs/wildcard /var/www/certs/wildcard/{key,cert}.pem
-  '';
-}
--- a/hosts/by-name/servo/services/nixserve.nix
+++ b/hosts/by-name/servo/services/nixserve.nix
@@ -1,21 +0,0 @@
-{ config, ... }:
-
-{
-  services.nginx.virtualHosts."nixcache.uninsane.org" = {
-    addSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    # serverAliases = [ "nixcache" ];
-    locations."/".extraConfig = ''
-      proxy_pass http://localhost:${toString config.services.nix-serve.port};
-      proxy_set_header Host $host;
-      proxy_set_header X-Real-IP $remote_addr;
-      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    '';
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."nixcache" = "native";
-
-  sane.services.nixserve.enable = true;
-  sane.services.nixserve.secretKeyFile = config.sops.secrets.nix_serve_privkey.path;
-}
--- a/hosts/by-name/servo/services/ntfy/default.nix
+++ b/hosts/by-name/servo/services/ntfy/default.nix
@@ -1,14 +0,0 @@
-# ntfy: UnifiedPush notification delivery system
-# - used to get push notifications out of Matrix and onto a Phone (iOS, Android, or a custom client)
-{ config, ... }:
-{
-  imports = [
-    ./ntfy-waiter.nix
-    ./ntfy-sh.nix
-  ];
-  sops.secrets."ntfy-sh-topic" = {
-    mode = "0440";
-    owner = config.users.users.ntfy-sh.name;
-    group = config.users.users.ntfy-sh.name;
-  };
-}
--- a/hosts/by-name/servo/services/ntfy/ntfy-sh.nix
+++ b/hosts/by-name/servo/services/ntfy/ntfy-sh.nix
@@ -1,92 +0,0 @@
-# ntfy: UnifiedPush notification delivery system
-# - used to get push notifications out of Matrix and onto a Phone (iOS, Android, or a custom client)
-#
-# config options:
-# - <https://docs.ntfy.sh/config/#config-options>
-#
-# usage:
-# - ntfy sub https://ntfy.uninsane.org/TOPIC
-# - ntfy pub https://ntfy.uninsane.org/TOPIC "my message"
-# in production, TOPIC is a shared secret between the publisher (Matrix homeserver) and the subscriber (phone)
-#
-# administering:
-# - sudo -u ntfy-sh ntfy access
-#
-# debugging:
-# - make sure that the keepalives are good:
-#   - on the subscriber machine, run `lsof -i4` to find the port being used
-#   - `sudo tcpdump tcp port <p>`
-#     - shouldn't be too spammy
-#
-# matrix integration:
-# - the user must manually point synapse to the ntfy endpoint:
-#   - `curl --header "Authorization: <your_token>" --data '{ "app_display_name": "sane-nix moby", "app_id": "ntfy.uninsane.org", "data": { "url": "https://ntfy.uninsane.org/_matrix/push/v1/notify", "format": "event_id_only" }, "device_display_name": "sane-nix moby", "kind": "http", "lang": "en-US", "profile_tag": "", "pushkey": "https://ntfy.uninsane.org/TOPIC" }' localhost:8008/_matrix/client/v3/pushers/set`
-#     where the token is grabbed from Element's help&about page when logged in
-#   - to remove, send this `curl` with `"kind": null`
-{ config, lib, pkgs, ... }:
-let
-  # subscribers need a non-443 public port to listen on as a way to easily differentiate this traffic
-  # at the IP layer, to enable e.g. wake-on-lan.
-  altPort = 2587;
-in
-{
-  sane.persist.sys.byStore.plaintext = [
-    # not 100% necessary to persist this, but ntfy does keep a 12hr (by default) cache
-    # for pushing notifications to users who become offline.
-    # ACLs also live here.
-    { user = "ntfy-sh"; group ="ntfy-sh"; path = "/var/lib/ntfy-sh"; }
-  ];
-
-  services.ntfy-sh.enable = true;
-  services.ntfy-sh.settings = {
-    base-url = "https://ntfy.uninsane.org";
-    behind-proxy = true;  # not sure if needed
-    # keepalive interval is a ntfy-specific keepalive thing, where it sends actual data down the wire.
-    # it's not simple TCP keepalive.
-    # defaults to 45s.
-    # note that the client may still do its own TCP-level keepalives, typically every 30s
-    keepalive-interval = "15m";
-    log-level = "trace";  # trace, debug, info (default), warn, error
-    auth-default-access = "deny-all";
-  };
-  systemd.services.ntfy-sh.serviceConfig.DynamicUser = lib.mkForce false;
-  systemd.services.ntfy-sh.preStart = ''
-    # make this specific topic read-write by world
-    # it would be better to use the token system, but that's extra complexity for e.g.
-    # how do i plumb a secret into the Matrix notification pusher
-    #
-    # note that this will fail upon first run, i.e. before ntfy has created its db.
-    # just restart the service.
-    topic=$(cat ${config.sops.secrets.ntfy-sh-topic.path})
-    ${pkgs.ntfy-sh}/bin/ntfy access everyone "$topic" read-write
-  '';
-
-
-  services.nginx.virtualHosts."ntfy.uninsane.org" = {
-    forceSSL = true;
-    enableACME = true;
-    listen = [
-      { addr = "0.0.0.0"; port = altPort; ssl = true; }
-      { addr = "0.0.0.0"; port = 443;  ssl = true; }
-      { addr = "0.0.0.0"; port = 80;   ssl = false; }
-    ];
-    locations."/" = {
-      proxyPass = "http://127.0.0.1:2586";
-      proxyWebsockets = true;  #< support websocket upgrades. without that, `ntfy sub` hangs silently
-      recommendedProxySettings = true; #< adds headers so ntfy logs include the real IP
-      extraConfig = ''
-        # absurdly long timeout (86400s=24h) so that we never hang up on clients.
-        # make sure the client is smart enough to detect a broken proxy though!
-        proxy_read_timeout 86400s;
-      '';
-    };
-  };
-  sane.dns.zones."uninsane.org".inet.CNAME."ntfy" = "native";
-
-  sane.ports.ports."${builtins.toString altPort}" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-ntfy.uninsane.org";
-  };
-}
--- a/hosts/by-name/servo/services/ntfy/ntfy-waiter
+++ b/hosts/by-name/servo/services/ntfy/ntfy-waiter
@@ -1,151 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i python3 -p "python3.withPackages (ps: [  ])" -p ntfy-sh
-
-import argparse
-import logging
-import os
-import socket
-import subprocess
-import sys
-import threading
-import time
-
-logger = logging.getLogger(__name__)
-
-LISTEN_QUEUE = 3
-WAKE_MESSAGE = b'notification\n'
-
-class Client:
-    def __init__(self, sock, addr_info, live_after: float):
-        self.live_after = live_after
-        self.sock = sock
-        self.addr_info = addr_info
-
-    def __cmp__(self, other: 'Client'):
-        return cmp(self.addr_info, other.addr_info)
-
-    def try_notify(self, message: bytes) -> bool:
-        """
-        returns true if we send a packet to notify client.
-        fals otherwise (e.g. the socket is dead).
-        """
-        ttl = self.live_after - time.time()
-        if ttl > 0:
-            logger.debug(f"sleeping {ttl:.2f}s until client {self.addr_info} is ready to receive notification")
-            time.sleep(ttl)
-
-        try:
-            self.sock.sendall(message)
-        except Exception as e:
-            logger.warning(f"failed to notify client {self.addr_info} {e}")
-            return False
-        else:
-            logger.info(f"successfully notified {self.addr_info}: {message}")
-            return True
-
-class Adapter:
-    def __init__(self, host: str, port: int, silence: int, topic: str):
-        self.host = host
-        self.port = port
-        self.silence = silence
-        self.topic = topic
-        self.clients = set()
-
-    def log_clients(self):
-        clients_str = '\n'.join(f'  {c.addr_info}' for c in self.clients)
-        logger.debug(f"clients alive ({len(self.clients)}):\n{clients_str}")
-
-    def add_client(self, client: Client):
-        # it's a little bit risky to keep more than one client at the same IP address,
-        # because it's possible a notification comes in and we ring the old connection,
-        # even when the new connection says "don't ring yet".
-        for c in set(self.clients):
-            if c.addr_info[0] == client.addr_info[0]:
-                logger.info(f"purging old client before adding new one at same address: {c.addr_info} -> {client.addr_info}")
-                self.clients.remove(c)
-
-        logger.info(f"accepted client at {client.addr_info}")
-        self.clients.add(client)
-
-    def listener_loop(self):
-        logger.info(f"listening for connections on {self.host}:{self.port}")
-        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        s.bind((self.host, self.port))
-        s.listen(LISTEN_QUEUE)
-        while True:
-            conn, addr_info = s.accept()
-            self.add_client(Client(conn, addr_info, live_after = time.time() + self.silence))
-
-    def notify_clients(self, message: bytes = WAKE_MESSAGE):
-        # notify every client, and drop any which have disconnected.
-        # note that we notify based on age (oldest -> youngest)
-        # because notifying young clients might entail sleeping until they're ready.
-        clients = sorted(self.clients, key=lambda c: (c.live_after, c.addr_info))
-
-        dead_clients = [
-            c for c in clients if not c.try_notify(message)
-        ]
-        for c in dead_clients:
-            self.clients.remove(c)
-
-        self.log_clients()
-
-    def notify_loop(self):
-        logger.info("waiting for notification events")
-        ntfy_proc = subprocess.Popen(
-            [
-                "ntfy",
-                "sub",
-                f"https://ntfy.uninsane.org/{self.topic}"
-            ],
-            stdout=subprocess.PIPE
-        )
-        for line in iter(ntfy_proc.stdout.readline, b''):
-            logger.debug(f"received notification: {line}")
-            self.notify_clients()
-
-def get_topic() -> str:
-    return open('/run/secrets/ntfy-sh-topic', 'rt').read().strip()
-
-def run_forever(callable):
-    try:
-        callable()
-    except Exception as e:
-        logger.error(f"{callable} failed: {e}")
-    else:
-        logger.error(f"{callable} unexpectedly returned")
-    # sys.exit(1)
-    os._exit(1)  # sometimes `sys.exit()` doesn't actually exit...
-
-def main():
-    logging.basicConfig()
-    logging.getLogger().setLevel(logging.DEBUG)
-
-    parser = argparse.ArgumentParser(description="accept connections and notify the other end upon ntfy activity, with a guaranteed amount of silence")
-    parser.add_argument('--verbose', action='store_true')
-    parser.add_argument('--host', type=str, default='')
-    parser.add_argument('--port', type=int)
-    parser.add_argument('--silence', type=int, help="number of seconds to remain silent upon accepting a connection")
-
-    args = parser.parse_args()
-
-    if args.verbose:
-        logging.getLogger().setLevel(logging.DEBUG)
-    else:
-        logging.getLogger().setLevel(logging.INFO)
-
-    adapter = Adapter(args.host, args.port, args.silence, get_topic())
-
-    listener_loop = threading.Thread(target=run_forever, name="listener_loop", args=(adapter.listener_loop,))
-    notify_loop = threading.Thread(target=run_forever, name="notify_loop", args=(adapter.notify_loop,))
-
-    # TODO: this method of exiting seems to sometimes leave the listener behind (?)
-    # preventing anyone else from re-binding the port.
-    listener_loop.start()
-    notify_loop.start()
-    listener_loop.join()
-    notify_loop.join()
-
-
-if __name__ == '__main__':
-    main()
--- a/hosts/by-name/servo/services/ntfy/ntfy-waiter.nix
+++ b/hosts/by-name/servo/services/ntfy/ntfy-waiter.nix
@@ -1,72 +0,0 @@
-# service which adapts ntfy-sh into something suitable specifically for the Pinephone's
-# wake-on-lan (WoL) feature.
-# notably, it provides a mechanism by which the caller can be confident of an interval in which
-# zero traffic will occur on the TCP connection, thus allowing it to enter sleep w/o fear of hitting
-# race conditions in the Pinephone WoL feature.
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.sane.ntfy-waiter;
-  portLow = 5550;
-  portHigh = 5559;
-  portRange = lib.range portLow portHigh;
-  numPorts = portHigh - portLow + 1;
-  mkService = port: let
-    silence = port - portLow;
-    flags = lib.optional cfg.verbose "--verbose";
-    cli = [
-      "${cfg.package}/bin/ntfy-waiter"
-      "--port"
-      "${builtins.toString port}"
-      "--silence"
-      "${builtins.toString silence}"
-    ] ++ flags;
-  in {
-    "ntfy-waiter-${builtins.toString silence}" = {
-      # TODO: run not as root (e.g. as ntfy-sh)
-      description = "wait for notification, with ${builtins.toString silence} seconds of guaranteed silence";
-      serviceConfig = {
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "5s";
-        ExecStart = lib.concatStringsSep " " cli;
-      };
-      after = [ "network.target" ];
-      wantedBy = [ "default.target" ];
-    };
-  };
-in
-{
-  options = with lib; {
-    sane.ntfy-waiter.enable = mkOption {
-      type = types.bool;
-      default = true;
-    };
-    sane.ntfy-waiter.verbose = mkOption {
-      type = types.bool;
-      default = true;
-    };
-    sane.ntfy-waiter.package = mkOption {
-      type = types.package;
-      default = pkgs.static-nix-shell.mkPython3Bin {
-        pname = "ntfy-waiter";
-        src = ./.;
-        pkgs = [ "ntfy-sh" ];
-      };
-      description = ''
-        exposed to provide an attr-path by which one may build the package for manual testing.
-      '';
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
-    sane.ports.ports = lib.mkMerge (lib.forEach portRange (port: {
-      "${builtins.toString port}" = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        visibleTo.wan = true;
-        description = "colin-notification-waiter-${builtins.toString (port+1)}-of-${builtins.toString numPorts}";
-      };
-    }));
-    systemd.services = lib.mkMerge (builtins.map mkService portRange);
-  };
-}
--- a/hosts/by-name/servo/services/pict-rs.nix
+++ b/hosts/by-name/servo/services/pict-rs.nix
@@ -1,23 +0,0 @@
-# pict-rs is an image database/store used by Lemmy.
-# i don't explicitly activate it here -- just adjust its defaults to be a bit friendlier
-{ config, lib, ... }:
-let
-  cfg = config.services.pict-rs;
-in
-{
-  sane.persist.sys.byStore.plaintext = lib.mkIf cfg.enable [
-    { user = "pict-rs"; group = "pict-rs"; path = cfg.dataDir; }
-  ];
-
-  systemd.services.pict-rs.serviceConfig = {
-    # fix to use a normal user so we can configure perms correctly
-    DynamicUser = lib.mkForce false;
-    User = "pict-rs";
-    Group = "pict-rs";
-  };
-  users.groups.pict-rs = {};
-  users.users.pict-rs = {
-    group = "pict-rs";
-    isSystemUser = true;
-  };
-}
--- a/hosts/by-name/servo/services/postgres.nix
+++ b/hosts/by-name/servo/services/postgres.nix
@@ -1,89 +0,0 @@
-{ pkgs, ... }:
-
-let
-  GiB = n: MiB 1024*n;
-  MiB = n: KiB 1024*n;
-  KiB = n: 1024*n;
-in
-{
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode?
-    { user = "postgres"; group = "postgres"; path = "/var/lib/postgresql"; }
-  ];
-  services.postgresql.enable = true;
-
-  # HOW TO UPDATE:
-  # postgres version updates are manual and require intervention.
-  # - `sane-stop-all-servo`
-  # - `systemctl start postgresql`
-  # - as `sudo su postgres`:
-  #   - `cd /var/log/postgresql`
-  #   - `pg_dumpall > state.sql`
-  #   - `echo placeholder > <new_version>`  # to prevent state from being created earlier than we want
-  # - then, atomically:
-  #   - update the `services.postgresql.package` here
-  #   - `dataDir` is atomically updated to match package; don't touch
-  #   - `nixos-rebuild --flake . switch ; sane-stop-all-servo`
-  # - `sudo rm -rf /var/lib/postgresql/<new_version>`
-  # - `systemctl start postgresql`
-  # - as `sudo su postgres`:
-  #   - `cd /var/lib/postgreql`
-  #   - `psql -f state.sql`
-  # - restart dependent services (maybe test one at a time)
-
-  services.postgresql.package = pkgs.postgresql_15;
-
-
-  # XXX colin: for a proper deploy, we'd want to include something for Pleroma here too.
-  # services.postgresql.initialScript = pkgs.writeText "synapse-init.sql" ''
-  #   CREATE ROLE "matrix-synapse" WITH LOGIN PASSWORD '<password goes here>';
-  #   CREATE DATABASE "matrix-synapse" WITH OWNER "matrix-synapse"
-  #     TEMPLATE template0
-  #     ENCODING = "UTF8"
-  #     LC_COLLATE = "C"
-  #     LC_CTYPE = "C";
-  # '';
-
-  # perf tuning
-  # - for recommended values see: <https://pgtune.leopard.in.ua/>
-  # - for official docs (sparse), see: <https://www.postgresql.org/docs/11/config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE>
-  services.postgresql.settings = {
-    # DB Version: 15
-    # OS Type: linux
-    # DB Type: web
-    # Total Memory (RAM): 32 GB
-    # CPUs num: 12
-    # Data Storage: ssd
-    max_connections = 200;
-    shared_buffers = "8GB";
-    effective_cache_size = "24GB";
-    maintenance_work_mem = "2GB";
-    checkpoint_completion_target = 0.9;
-    wal_buffers = "16MB";
-    default_statistics_target = 100;
-    random_page_cost = 1.1;
-    effective_io_concurrency = 200;
-    work_mem = "10485kB";
-    min_wal_size = "1GB";
-    max_wal_size = "4GB";
-    max_worker_processes = 12;
-    max_parallel_workers_per_gather = 4;
-    max_parallel_workers = 12;
-    max_parallel_maintenance_workers = 4;
-  };
-
-  # daily backups to /var/backup
-  services.postgresqlBackup.enable = true;
-
-  # common admin operations:
-  #   sudo systemctl start postgresql
-  #   sudo -u postgres psql
-  #   > \l   # lists all databases
-  #   > \du  # lists all roles
-  #   > \c pleroma  # connects to database by name
-  #   > \d   # shows all tables
-  #   > \q   # exits psql
-  # dump/restore (-F t = tar):
-  #   sudo -u postgres pg_dump -F t pleroma > /backup/pleroma-db.tar
-  #   sudo -u postgres -g postgres pg_restore -d pleroma /backup/pleroma-db.tar
-}
--- a/hosts/by-name/servo/services/prosody/default.nix
+++ b/hosts/by-name/servo/services/prosody/default.nix
@@ -1,289 +0,0 @@
-# example configs:
-# - official: <https://prosody.im/doc/example_config>
-# - nixos: <https://github.com/kittywitch/nixfiles/blob/main/services/prosody.nix>
-# config options:
-# - <https://prosody.im/doc/configure>
-#
-# modules:
-# - main: <https://prosody.im/doc/modules>
-# - community: <https://modules.prosody.im/index.html>
-#
-# debugging:
-# - logging:
-#   - enable `stanza_debug` module
-#   - enable `log.debug = "*syslog"` in extraConfig
-# - interactive:
-#   - `telnet localhost 5582` (this is equal to `prosodyctl shell` -- but doesn't hang)
-#     - `watch:stanzas(target_spec, filter)` -> to log stanzas, for version > 0.12
-#   - console docs: <https://prosody.im/doc/console>
-#   - can modify/inspect arbitrary internals (lua) by prefixing line with `> `
-#     - e.g. `> _G` to print all globals
-#
-# sanity checks:
-# - `sudo -u prosody -g prosody prosodyctl check connectivity`
-# - `sudo -u prosody -g prosody prosodyctl check turn`
-# - `sudo -u prosody -g prosody prosodyctl check turn -v --ping=stun.conversations.im`
-#   - checks that my stun/turn server is usable by clients of conversations.im (?)
-# - `sudo -u prosody -g prosody prosodyctl check`  (dns, config, certs)
-#
-#
-# create users with:
-# - `sudo -u prosody prosodyctl adduser colin@uninsane.org`
-#
-#
-# federation/support matrix:
-# - nixnet.services (runs ejabberd):
-#   - WORKS: sending and receiving PMs and calls (2023/10/15)
-#     - N.B.: it didn't originally work; was solved by disabling the lua-unbound DNS option & forcing the system/local resolver
-# - cheogram (XMPP <-> SMS gateway):
-#   - WORKS: sending and receiving PMs, images (2023/10/15)
-#   - PARTIAL: calls (xmpp -> tel works; tel -> xmpp fails)
-#     - maybe i need to setup stun/turn
-#
-# TODO:
-# - enable push notifications (mod_cloud_notify)
-# - optimize coturn (e.g. move off of the VPN!)
-# - ensure muc is working
-# - enable file uploads
-#   - "upload.xmpp.uninsane.org:http_upload: URL: <https://upload.xmpp.uninsane.org:5281/upload> - Ensure this can be reached by users"
-# - disable or fix bosh (jabber over http):
-#   - "certmanager: No certificate/key found for client_https port 0"
-
-{ lib, pkgs, ... }:
-
-let
-  # enables very verbose logging
-  enableDebug = false;
-in
-{
-  sane.persist.sys.byStore.plaintext = [
-    { user = "prosody"; group = "prosody"; path = "/var/lib/prosody"; }
-  ];
-  sane.ports.ports."5000" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-xmpp-prosody-fileshare-proxy65";
-  };
-  sane.ports.ports."5222" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-xmpp-client-to-server";
-  };
-  sane.ports.ports."5223" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-xmpps-client-to-server";  # XMPP over TLS
-  };
-  sane.ports.ports."5269" = {
-    protocol = [ "tcp" ];
-    visibleTo.wan = true;
-    description = "colin-xmpp-server-to-server";
-  };
-  sane.ports.ports."5270" = {
-    protocol = [ "tcp" ];
-    visibleTo.wan = true;
-    description = "colin-xmpps-server-to-server";  # XMPP over TLS
-  };
-  sane.ports.ports."5280" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-xmpp-bosh";
-  };
-  sane.ports.ports."5281" = {
-    protocol = [ "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    description = "colin-xmpp-prosody-https";  # necessary?
-  };
-
-  users.users.prosody.extraGroups = [
-    "nginx"  # provide access to certs
-    "ntfy-sh"  # access to secret ntfy topic
-  ];
-
-  security.acme.certs."uninsane.org".extraDomainNames = [
-    "xmpp.uninsane.org"
-    "conference.xmpp.uninsane.org"
-    "upload.xmpp.uninsane.org"
-  ];
-
-  # exists so the XMPP server's cert can obtain altNames for all its resources
-  services.nginx.virtualHosts."xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."conference.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-  services.nginx.virtualHosts."upload.xmpp.uninsane.org" = {
-    useACMEHost = "uninsane.org";
-  };
-
-  sane.dns.zones."uninsane.org".inet = {
-    # XXX: SRV records have to point to something with a A/AAAA record; no CNAMEs
-    A."xmpp" =                "%ANATIVE%";
-    CNAME."conference.xmpp" = "xmpp";
-    CNAME."upload.xmpp" =     "xmpp";
-
-    # _Service._Proto.Name    TTL Class SRV    Priority Weight Port Target
-    # - <https://xmpp.org/extensions/xep-0368.html>
-    # something's requesting the SRV records for conference.xmpp, so let's include it
-    # nothing seems to request XMPP SRVs for the other records (except @)
-    # lower numerical priority field tells clients to prefer this method
-    SRV."_xmpps-client._tcp.conference.xmpp" =       "3 50 5223 xmpp";
-    SRV."_xmpps-server._tcp.conference.xmpp" =       "3 50 5270 xmpp";
-    SRV."_xmpp-client._tcp.conference.xmpp" =        "5 50 5222 xmpp";
-    SRV."_xmpp-server._tcp.conference.xmpp" =        "5 50 5269 xmpp";
-
-    SRV."_xmpps-client._tcp" =                "3 50 5223 xmpp";
-    SRV."_xmpps-server._tcp" =                "3 50 5270 xmpp";
-    SRV."_xmpp-client._tcp" =                 "5 50 5222 xmpp";
-    SRV."_xmpp-server._tcp" =                 "5 50 5269 xmpp";
-  };
-
-  # help Prosody find its certificates.
-  # pointing it to /var/lib/acme doesn't quite work because it expects the private key
-  # to be named `privkey.pem` instead of acme's `key.pem`
-  # <https://prosody.im/doc/certificates#automatic_location>
-  sane.fs."/etc/prosody/certs/uninsane.org/fullchain.pem" = {
-    symlink.target = "/var/lib/acme/uninsane.org/fullchain.pem";
-    wantedBeforeBy = [ "prosody.service" ];
-  };
-  sane.fs."/etc/prosody/certs/uninsane.org/privkey.pem" = {
-    symlink.target = "/var/lib/acme/uninsane.org/key.pem";
-    wantedBeforeBy = [ "prosody.service" ];
-  };
-
-  services.prosody = {
-    enable = true;
-    package = pkgs.prosody.override {
-      # XXX(2023/10/15): build without lua-unbound support.
-      # this forces Prosody to fall back to the default Lua DNS resolver, which seems more reliable.
-      # fixes errors like "unbound.queryXYZUV: Resolver error: out of memory"
-      # related: <https://issues.prosody.im/1737#comment-11>
-      lua.withPackages = selector: pkgs.lua.withPackages (p:
-        selector (p // { luaunbound = null; })
-      );
-      # withCommunityModules = [ "turncredentials" ];
-    };
-    admins = [ "colin@uninsane.org" ];
-    # allowRegistration = false;  # defaults to false
-
-    muc = [
-      {
-        domain = "conference.xmpp.uninsane.org";
-      }
-    ];
-    uploadHttp.domain = "upload.xmpp.uninsane.org";
-
-    virtualHosts = {
-      # "Prosody requires at least one enabled VirtualHost to function. You can
-      # safely remove or disable 'localhost' once you have added another."
-      # localhost = {
-      #   domain = "localhost";
-      #   enabled = true;
-      # };
-      "xmpp.uninsane.org" = {
-        domain = "uninsane.org";
-        enabled = true;
-      };
-    };
-
-    ## modules:
-    # these are enabled by default, via <repo:nixos/nixpkgs:/pkgs/servers/xmpp/prosody/default.nix>
-    # - cloud_notify
-    # - http_upload
-    # - vcard_muc
-    # these are enabled by the module defaults (services.prosody.modules.<foo>)
-    # - admin_adhoc
-    # - blocklist
-    # - bookmarks
-    # - carbons
-    # - cloud_notify
-    # - csi
-    # - dialback
-    # - disco
-    # - http_files
-    # - mam
-    # - pep
-    # - ping
-    # - private
-    #   - XEP-0049: let clients store arbitrary (private) data on the server
-    # - proxy65
-    #   - XEP-0065: allow server to proxy file transfers between two clients who are behind NAT
-    # - register
-    # - roster
-    # - saslauth
-    # - smacks
-    # - time
-    # - tls
-    # - uptime
-    # - vcard_legacy
-    # - version
-
-    extraPluginPaths = [ ./modules ];
-
-    extraModules = [
-      # admin_shell: allows `prosodyctl shell` to work
-      # see: <https://prosody.im/doc/modules/mod_admin_shell>
-      # see: <https://prosody.im/doc/console>
-      "admin_shell"
-      "admin_telnet"  #< needed by admin_shell
-      # lastactivity: XEP-0012: allow users to query how long another user has been idle for
-      # - not sure why i enabled this; think it was in someone's config i referenced
-      "lastactivity"
-      # allows prosody to share TURN/STUN secrets with XMPP clients to provide them access to the coturn server.
-      # see: <https://prosody.im/doc/coturn>
-      "turn_external"
-      # legacy coturn integration
-      # see: <https://modules.prosody.im/mod_turncredentials.html>
-      # "turncredentials"
-      "sane_ntfy"
-    ] ++ lib.optionals enableDebug [
-      "stanza_debug"  #< logs EVERY stanza as debug: <https://prosody.im/doc/modules/mod_stanza_debug>
-    ];
-
-    extraConfig = ''
-      local function readAll(file)
-        local f = assert(io.open(file, "rb"))
-        local content = f:read("*all")
-        f:close()
-        -- remove trailing newline
-        return string.gsub(content, "%s+", "")
-      end
-
-      -- logging docs:
-      -- - <https://prosody.im/doc/logging>
-      -- - <https://prosody.im/doc/advanced_logging>
-      -- levels: debug, info, warn, error
-      log = {
-        ${if enableDebug then "debug" else "info"} = "*syslog";
-      }
-
-      -- see: <https://prosody.im/doc/certificates#automatic_location>
-      -- try to solve: "certmanager: Error indexing certificate directory /etc/prosody/certs: cannot open /etc/prosody/certs: No such file or directory"
-      -- only, this doesn't work because prosody doesn't like acme's naming scheme
-      -- certificates = "/var/lib/acme"
-
-      c2s_direct_tls_ports = { 5223 }
-      s2s_direct_tls_ports = { 5270 }
-
-      turn_external_host = "turn.uninsane.org"
-      turn_external_secret = readAll("/var/lib/coturn/shared_secret.bin")
-      -- turn_external_user = "prosody"
-
-      -- legacy mod_turncredentials integration
-      -- turncredentials_host = "turn.uninsane.org"
-      -- turncredentials_secret = readAll("/var/lib/coturn/shared_secret.bin")
-
-      ntfy_binary = "${pkgs.ntfy-sh}/bin/ntfy"
-      ntfy_topic = readAll("/run/secrets/ntfy-sh-topic")
-
-      -- s2s_require_encryption = true
-      -- c2s_require_encryption = true
-    '';
-  };
-}
--- a/hosts/by-name/servo/services/prosody/modules/mod_sane_ntfy.lua
+++ b/hosts/by-name/servo/services/prosody/modules/mod_sane_ntfy.lua
@@ -1,52 +0,0 @@
-- simple proof-of-concept Prosody module
-- module development guide: <https://prosody.im/doc/developers/modules>
-- module API docs: <https://prosody.im/doc/developers/moduleapi>
--
-- much of this code is lifted from Prosody's own `mod_cloud_notify`
-
-local jid = require"util.jid";
-
-local ntfy = module:get_option_string("ntfy_binary", "ntfy");
-local ntfy_topic = module:get_option_string("ntfy_topic", "xmpp");
-
-module:log("info", "initialized");
-
-local function is_urgent(stanza)
-  if stanza.name == "message" then
-    if stanza:get_child("propose", "urn:xmpp:jingle-message:0") then
-      return true, "jingle call";
-    end
-  end
-end
-
-local function publish_ntfy(message)
-  -- message should be the message to publish
-  local ntfy_url = string.format("https://ntfy.uninsane.org/%s", ntfy_topic)
-  local cmd = string.format("%s pub %q %q", ntfy, ntfy_url, message)
-  module.log("debug", "invoking ntfy: %s", cmd)
-  local success, reason, code = os.execute(cmd)
-  if not success then
-    module:log("warn", "ntfy failed: %s => %s %d", cmd, reason, code)
-  end
-end
-
-
-local function archive_message_added(event)
-  -- event is: { origin = origin, stanza = stanza, for_user = store_user, id = id }
-  local stanza = event.stanza;
-  local to = stanza.attr.to;
-  to = to and jid.split(to) or event.origin.username;
-
-  -- only notify if the stanza destination is the mam user we store it for
-  if event.for_user == to then
-    local is_urgent_stanza, urgent_reason = is_urgent(event.stanza);
-
-    if is_urgent_stanza then
-      module:log("info", "urgent push for %s (%s)", to, urgent_reason);
-      publish_ntfy(urgent_reason)
-    end
-  end
-end
-
-
-module:hook("archive-message-added", archive_message_added);
--- a/hosts/by-name/servo/services/transmission.nix
+++ b/hosts/by-name/servo/services/transmission.nix
@@ -1,95 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: mode? we need this specifically for the stats tracking in .config/
-    { user = "transmission"; group = config.users.users.transmission.group; path = "/var/lib/transmission"; }
-  ];
-  users.users.transmission.extraGroups = [ "media" ];
-
-  services.transmission.enable = true;
-  services.transmission.package = pkgs.transmission_4;  #< 2023/09/06: nixpkgs `transmission` defaults to old 3.00
-  #v setting `group` this way doesn't tell transmission to `chown` the files it creates
-  #  it's a nixpkgs setting which just runs the transmission daemon as this group
-  services.transmission.group = "media";
-
-  # transmission will by default not allow the world to read its files.
-  services.transmission.downloadDirPermissions = "775";
-  services.transmission.extraFlags = [
-    "--log-level=debug"
-  ];
-
-  services.transmission.settings = {
-    # message-level = 3;  #< enable for debug logging. 0-3, default is 2.
-    # 0.0.0.0 => allow rpc from any host: we gate it via firewall and auth requirement
-    rpc-bind-address = "0.0.0.0";
-    #rpc-host-whitelist = "bt.uninsane.org";
-    #rpc-whitelist = "*.*.*.*";
-    rpc-authentication-required = true;
-    rpc-username = "colin";
-    # salted pw. to regenerate, set this plaintext, run nixos-rebuild, and then find the salted pw in:
-    # /var/lib/transmission/.config/transmission-daemon/settings.json
-    rpc-password = "{503fc8928344f495efb8e1f955111ca5c862ce0656SzQnQ5";
-    rpc-whitelist-enabled = false;
-
-    # hopefully, make the downloads world-readable
-    # umask = 0;  #< default is 2: i.e. deny writes from world
-
-    # force peer connections to be encrypted
-    encryption = 2;
-
-    # units in kBps
-    speed-limit-down = 3000;
-    speed-limit-down-enabled = true;
-    speed-limit-up = 600;
-    speed-limit-up-enabled = true;
-
-    # see: https://git.zknt.org/mirror/transmission/commit/cfce6e2e3a9b9d31a9dafedd0bdc8bf2cdb6e876?lang=bg-BG
-    anti-brute-force-enabled = false;
-
-    download-dir = "/var/lib/uninsane/media";
-    incomplete-dir = "/var/lib/uninsane/media/incomplete";
-    # transmission regularly fails to move stuff from the incomplete dir to the main one, so disable:
-    # TODO: uncomment this line!
-    incomplete-dir-enabled = false;
-  };
-
-  systemd.services.transmission.after = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.transmission.partOf = [ "wireguard-wg-ovpns.service" ];
-  systemd.services.transmission.serviceConfig = {
-    # run this behind the OVPN static VPN
-    NetworkNamespacePath = "/run/netns/ovpns";
-    Restart = "on-failure";
-    RestartSec = "30s";
-  };
-
-  # service to automatically backup torrents i add to transmission
-  systemd.services.backup-torrents = {
-    description = "archive torrents to storage not owned by transmission";
-    script = ''
-      ${pkgs.rsync}/bin/rsync -arv /var/lib/transmission/.config/transmission-daemon/torrents/ /var/backup/torrents/
-    '';
-  };
-  systemd.timers.backup-torrents = {
-    wantedBy = [ "multi-user.target" ];
-    timerConfig = {
-      OnStartupSec = "11min";
-      OnUnitActiveSec = "240min";
-    };
-  };
-
-  # transmission web client
-  services.nginx.virtualHosts."bt.uninsane.org" = {
-    # basicAuth is literally cleartext user/pw, so FORCE this to happen over SSL
-    forceSSL = true;
-    enableACME = true;
-    # inherit kTLS;
-    locations."/" = {
-      # proxyPass = "http://ovpns.uninsane.org:9091";
-      proxyPass = "http://10.0.1.6:9091";
-    };
-  };
-
-  sane.dns.zones."uninsane.org".inet.CNAME."bt" = "native";
-}
-
--- a/hosts/by-name/servo/services/trust-dns.nix
+++ b/hosts/by-name/servo/services/trust-dns.nix
@@ -1,208 +0,0 @@
-# TODO: split this file apart into smaller files to make it easier to understand
-{ config, lib, pkgs, ... }:
-
-let
-  nativeAddrs = lib.mapAttrs (_name: builtins.head) config.sane.dns.zones."uninsane.org".inet.A;
-  bindOvpn = "10.0.1.5";
-in lib.mkMerge [
-{
-  services.trust-dns.enable = true;
-
-  # don't bind to IPv6 until i explicitly test that stack
-  services.trust-dns.settings.listen_addrs_ipv6 = [];
-  services.trust-dns.quiet = true;
-  # services.trust-dns.debug = true;
-
-  sane.ports.ports."53" = {
-    protocol = [ "udp" "tcp" ];
-    visibleTo.lan = true;
-    visibleTo.wan = true;
-    visibleTo.ovpn = true;
-    description = "colin-dns-hosting";
-  };
-
-  sane.dns.zones."uninsane.org".TTL = 900;
-
-  # SOA record structure: <https://en.wikipedia.org/wiki/SOA_record#Structure>
-  # SOA MNAME RNAME (... rest)
-  # MNAME = Master name server for this zone. this is where update requests should be sent.
-  # RNAME = admin contact (encoded email address)
-  # Serial = YYYYMMDDNN, where N is incremented every time this file changes, to trigger secondary NS to re-fetch it.
-  # Refresh = how frequently secondary NS should query master
-  # Retry = how long secondary NS should wait until re-querying master after a failure (must be < Refresh)
-  # Expire = how long secondary NS should continue to reply to queries after master fails (> Refresh + Retry)
-  sane.dns.zones."uninsane.org".inet = {
-    SOA."@" = ''
-      ns1.uninsane.org. admin-dns.uninsane.org. (
-                                      2023092101 ; Serial
-                                      4h         ; Refresh
-                                      30m        ; Retry
-                                      7d         ; Expire
-                                      5m)        ; Negative response TTL
-    '';
-    TXT."rev" = "2023092101";
-
-    CNAME."native" = "%CNAMENATIVE%";
-    A."@" =      "%ANATIVE%";
-    A."servo.wan" = "%AWAN%";
-    A."servo.lan" = config.sane.hosts.by-name."servo".lan-ip;
-    A."servo.hn" = config.sane.hosts.by-name."servo".wg-home.ip;
-
-    # XXX NS records must also not be CNAME
-    # it's best that we keep this identical, or a superset of, what org. lists as our NS.
-    # so, org. can specify ns2/ns3 as being to the VPN, with no mention of ns1. we provide ns1 here.
-    A."ns1" =    "%ANATIVE%";
-    A."ns2" =    "185.157.162.178";
-    A."ns3" =    "185.157.162.178";
-    A."ovpns" =  "185.157.162.178";
-    NS."@" = [
-      "ns1.uninsane.org."
-      "ns2.uninsane.org."
-      "ns3.uninsane.org."
-    ];
-  };
-
-  services.trust-dns.settings.zones = [ "uninsane.org" ];
-
-  # TODO: can i transform this into some sort of service group?
-  # have `systemctl restart trust-dns.service` restart all the individual services?
-  systemd.services.trust-dns.serviceConfig = {
-    DynamicUser = lib.mkForce false;
-    User = "trust-dns";
-    Group = "trust-dns";
-    wantedBy = lib.mkForce [];
-  };
-  systemd.services.trust-dns.enable = false;
-
-  users.groups.trust-dns = {};
-  users.users.trust-dns = {
-    group = "trust-dns";
-    isSystemUser = true;
-  };
-
-  # sane.services.dyn-dns.restartOnChange = [ "trust-dns.service" ];
-
-  networking.nat.enable = true;
-  networking.nat.extraCommands = ''
-    # redirect incoming DNS requests from LAN addresses
-    #   to the LAN-specialized DNS service
-    # N.B.: use the `nixos-*` chains instead of e.g. PREROUTING
-    #   because they get cleanly reset across activations or `systemctl restart firewall`
-    #   instead of accumulating cruft
-    iptables -t nat -A nixos-nat-pre -p udp --dport 53 \
-      -m iprange --src-range 10.78.76.0-10.78.79.255 \
-      -j DNAT --to-destination :1053
-    iptables -t nat -A nixos-nat-pre -p tcp --dport 53 \
-      -m iprange --src-range 10.78.76.0-10.78.79.255 \
-      -j DNAT --to-destination :1053
-  '';
-  sane.ports.ports."1053" = {
-    # because the NAT above redirects in nixos-nat-pre, LAN requests behave as though they arrived on the external interface at the redirected port.
-    # TODO: try nixos-nat-post instead?
-    # TODO: or, don't NAT from port 53 -> port 1053, but rather nat from LAN addr to a loopback addr.
-    # - this is complicated in that loopback is a different interface than eth0, so rewriting the destination address would cause the packets to just be dropped by the interface
-    protocol = [ "udp" "tcp" ];
-    visibleTo.lan = true;
-    description = "colin-redirected-dns-for-lan-namespace";
-  };
-}
-{
-  systemd.services =
-    let
-      sed = "${pkgs.gnused}/bin/sed";
-      stateDir = "/var/lib/trust-dns";
-      zoneTemplate = pkgs.writeText "uninsane.org.zone.in" config.sane.dns.zones."uninsane.org".rendered;
-
-      zoneDirFor = flavor: "${stateDir}/${flavor}";
-      zoneFor = flavor: "${zoneDirFor flavor}/uninsane.org.zone";
-      mkTrustDnsService = opts: flavor: let
-        flags = let baseCfg = config.services.trust-dns; in
-          (lib.optional baseCfg.debug "--debug") ++ (lib.optional baseCfg.quiet "--quiet");
-        flagsStr = builtins.concatStringsSep " " flags;
-
-        anative = nativeAddrs."servo.${flavor}";
-
-        toml = pkgs.formats.toml { };
-        configTemplate = opts.config or (toml.generate "trust-dns-${flavor}.toml" (
-          (
-            lib.filterAttrsRecursive (_: v: v != null) config.services.trust-dns.settings
-          ) // {
-            listen_addrs_ipv4 = opts.listen or [ anative ];
-          }
-        ));
-        configFile = "${stateDir}/${flavor}-config.toml";
-
-        port = opts.port or 53;
-      in {
-        description = "trust-dns Domain Name Server (serving ${flavor})";
-        unitConfig.Documentation = "https://trust-dns.org/";
-
-        preStart = ''
-          wan=$(cat '${config.sane.services.dyn-dns.ipPath}')
-          ${sed} s/%AWAN%/$wan/ ${configTemplate} > ${configFile}
-        '' + lib.optionalString (!opts ? config) ''
-          mkdir -p ${zoneDirFor flavor}
-          ${sed} \
-            -e s/%CNAMENATIVE%/servo.${flavor}/ \
-            -e s/%ANATIVE%/${anative}/ \
-            -e s/%AWAN%/$wan/ \
-            -e s/%AOVPNS%/185.157.162.178/ \
-            ${zoneTemplate} > ${zoneFor flavor}
-        '';
-        serviceConfig = config.systemd.services.trust-dns.serviceConfig // {
-          ExecStart = ''
-            ${pkgs.trust-dns}/bin/${pkgs.trust-dns.meta.mainProgram} \
-            --port ${builtins.toString port} \
-            --zonedir ${zoneDirFor flavor}/ \
-            --config ${configFile} ${flagsStr}
-          '';
-        };
-
-        after = [ "network.target" ];
-        wantedBy = [ "multi-user.target" ];
-      };
-    in {
-      trust-dns-wan = mkTrustDnsService { listen = [ nativeAddrs."servo.lan" bindOvpn ]; } "wan";
-      trust-dns-lan = mkTrustDnsService { port = 1053; } "lan";
-      trust-dns-hn = mkTrustDnsService { port = 1053; } "hn";
-      trust-dns-hn-resolver = mkTrustDnsService {
-        config = pkgs.writeText "hn-resolver-config.toml" ''
-          # i host a resolver in the wireguard VPN so that clients can resolve DNS through the VPN.
-          # (that's what this file achieves).
-          #
-          # one would expect this resolver could host the authoritative zone for `uninsane.org`, and then forward everything else to the system resolver...
-          # and while that works for `dig`, it breaks for `nslookup` (and so `ssh`, etc).
-          #
-          # DNS responses include a flag for if the responding server is the authority of the zone queried.
-          # it seems that default Linux stub resolvers either:
-          # - expect DNSSEC when the response includes that bit, or
-          # - expect A records to be in the `answer` section instead of `additional` section.
-          # or perhaps something more nuanced. but for `nslookup` to be reliable, it has to talk to an
-          # instance of trust-dns which is strictly a resolver, with no authority.
-          # hence, this config: a resolver which forwards to the actual authority.
-
-          listen_addrs_ipv4 = ["${nativeAddrs."servo.hn"}"]
-          listen_addrs_ipv6 = []
-
-          [[zones]]
-          zone = "uninsane.org"
-          zone_type = "Forward"
-          stores = { type = "forward", name_servers = [{ socket_addr = "${nativeAddrs."servo.hn"}:1053", protocol = "udp", trust_nx_responses = true }] }
-
-          [[zones]]
-          # forward the root zone to the local DNS resolver
-          zone = "."
-          zone_type = "Forward"
-          stores = { type = "forward", name_servers = [{ socket_addr = "127.0.0.53:53", protocol = "udp", trust_nx_responses = true }] }
-        '';
-      } "hn-resolver";
-    };
-
-  sane.services.dyn-dns.restartOnChange = [
-    "trust-dns-wan.service"
-    "trust-dns-lan.service"
-    "trust-dns-hn.service"
-    # "trust-dns-hn-resolver.service"  # doesn't need restart because it doesn't know about WAN IP
-  ];
-}
-]
--- a/hosts/by-name/servo/services/wikipedia.nix
+++ b/hosts/by-name/servo/services/wikipedia.nix
@@ -1,30 +0,0 @@
-# docs: <https://nixos.wiki/wiki/MediaWiki>
-{ config, lib, ... }:
-
-# XXX: working to host wikipedia with kiwix instead of mediawiki
-# mediawiki does more than i need and isn't obviously superior in any way
-# except that the dumps are more frequent/up-to-date.
-lib.mkIf false
-{
-  sops.secrets."mediawiki_pw" = {
-    owner = config.users.users.mediawiki.name;
-  };
-
-  services.mediawiki.enable = true;
-  services.mediawiki.name = "Uninsane Wiki";
-  services.mediawiki.passwordFile = config.sops.secrets.mediawiki_pw.path;
-  services.mediawiki.extraConfig = ''
-    # Disable anonymous editing
-    $wgGroupPermissions['*']['edit'] = false;
-  '';
-  services.mediawiki.virtualHost.listen = [
-    {
-      ip = "127.0.0.1";
-      port = 8013;
-      ssl = false;
-    }
-  ];
-  services.mediawiki.virtualHost.hostName = "w.uninsane.org";
-  services.mediawiki.virtualHost.adminAddr = "admin+mediawiki@uninsane.org";
-  # services.mediawiki.extensions = TODO: wikipedia sync extension?
-}
--- a/hosts/common/default.nix
+++ b/hosts/common/default.nix
@@ -1,102 +0,0 @@
-{ lib, pkgs, ... }:
-{
-  imports = [
-    ./feeds.nix
-    ./fs.nix
-    ./hardware
-    ./home
-    ./hosts.nix
-    ./ids.nix
-    ./machine-id.nix
-    ./net.nix
-    ./nix-path
-    ./persist.nix
-    ./programs
-    ./secrets.nix
-    ./ssh.nix
-    ./users
-    ./vpn.nix
-  ];
-
-  sane.nixcache.enable-trusted-keys = true;
-  sane.nixcache.enable = lib.mkDefault true;
-  sane.persist.enable = lib.mkDefault true;
-  sane.programs.sysadminUtils.enableFor.system = lib.mkDefault true;
-  sane.programs.consoleUtils.enableFor.user.colin = lib.mkDefault true;
-
-  nixpkgs.config.allowUnfree = true;
-  nixpkgs.config.allowBroken = true;  # NIXPKGS_ALLOW_BROKEN
-
-  # time.timeZone = "America/Los_Angeles";
-  time.timeZone = "Etc/UTC";  # DST is too confusing for me => use a stable timezone
-
-  # allow `nix flake ...` command
-  # TODO: is this still required?
-  nix.extraOptions = ''
-    experimental-features = nix-command flakes
-  '';
-  # hardlinks identical files in the nix store to save 25-35% disk space.
-  # unclear _when_ this occurs. it's not a service.
-  # does the daemon continually scan the nix store?
-  # does the builder use some content-addressed db to efficiently dedupe?
-  nix.settings.auto-optimise-store = true;
-
-  services.journald.extraConfig = ''
-    # docs: `man journald.conf`
-    # merged journald config is deployed to /etc/systemd/journald.conf
-    [Journal]
-    # disable journal compression because the underlying fs is compressed
-    Compress=no
-  '';
-
-  systemd.services.nix-daemon.serviceConfig = {
-    # the nix-daemon manages nix builders
-    # kill nix-daemon subprocesses when systemd-oomd detects an out-of-memory condition
-    # see:
-    # - nixos PR that enabled systemd-oomd: <https://github.com/NixOS/nixpkgs/pull/169613>
-    # - systemd's docs on these properties: <https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html#ManagedOOMSwap=auto%7Ckill>
-    #
-    # systemd's docs warn that without swap, systemd-oomd might not be able to react quick enough to save the system.
-    # see `man oomd.conf` for further tunables that may help.
-    #
-    # alternatively, apply this more broadly with `systemd.oomd.enableSystemSlice = true` or `enableRootSlice`
-    # TODO: also apply this to the guest user's slice (user-1100.slice)
-    # TODO: also apply this to distccd
-    ManagedOOMMemoryPressure = "kill";
-    ManagedOOMSwap = "kill";
-  };
-
-
-  system.activationScripts.nixClosureDiff = {
-    supportsDryActivation = true;
-    text = ''
-      # show which packages changed versions or are new/removed in this upgrade
-      # source: <https://github.com/luishfonseca/dotfiles/blob/32c10e775d9ec7cc55e44592a060c1c9aadf113e/modules/upgrade-diff.nix>
-      ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
-    '';
-  };
-
-  # disable non-required packages like nano, perl, rsync, strace
-  environment.defaultPackages = [];
-
-  # dconf docs: <https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/desktop_migration_and_administration_guide/profiles>
-  # this lets programs temporarily write user-level dconf settings (aka gsettings).
-  # they're written to ~/.config/dconf/user, unless `DCONF_PROFILE` is set to something other than the default of /etc/dconf/profile/user
-  # find keys/values with `dconf dump /`
-  programs.dconf.enable = true;
-  programs.dconf.packages = [
-    (pkgs.writeTextFile {
-      name = "dconf-user-profile";
-      destination = "/etc/dconf/profile/user";
-      text = ''
-        user-db:user
-        system-db:site
-      '';
-    })
-  ];
-  # sane.programs.glib.enableFor.user.colin = true;  # for `gsettings`
-
-  # link debug symbols into /run/current-system/sw/lib/debug
-  # hopefully picked up by gdb automatically?
-  environment.enableDebugInfo = true;
-}
--- a/hosts/common/feeds.nix
+++ b/hosts/common/feeds.nix
@@ -1,249 +0,0 @@
-# where to find good stuff?
-# - podcasts w/ a community: <https://lemmyverse.net/communities?query=podcast>
-# - podcast rec thread: <https://lemmy.ml/post/1565858>
-#
-# candidates:
-# - The Nonlinear Library (podcast): <https://forum.effectivealtruism.org/posts/JTZTBienqWEAjGDRv/listen-to-more-ea-content-with-the-nonlinear-library>
-#   - has ~10 posts per day, text-to-speech; i would need better tagging before adding this
-# - <https://www.metaculus.com/questions/11102/introducing-the-metaculus-journal-podcast/>
-#   - dead since 2022/10 - 2023/03
-
-{ lib, sane-data, ... }:
-let
-  hourly = { freq = "hourly"; };
-  daily = { freq = "daily"; };
-  weekly = { freq = "weekly"; };
-  infrequent = { freq = "infrequent"; };
-
-  art = { cat = "art"; };
-  humor = { cat = "humor"; };
-  pol = { cat = "pol"; };  # or maybe just "social"
-  rat = { cat = "rat"; };
-  tech = { cat = "tech"; };
-  uncat = { cat = "uncat"; };
-
-  text = { format = "text"; };
-  img = { format = "image"; };
-
-  mkRss = format: url: { inherit url format; } // uncat // infrequent;
-  # format-specific helpers
-  mkText = mkRss "text";
-  mkImg = mkRss "image";
-  mkPod = mkRss "podcast";
-
-  # host-specific helpers
-  mkSubstack = subdomain: { substack = subdomain; };
-
-  fromDb = name:
-    let
-      raw = sane-data.feeds."${name}";
-    in {
-      url = raw.url;
-      # not sure the exact mapping with velocity here: entries per day?
-      freq = lib.mkIf (raw.velocity or 0 != 0) (lib.mkDefault (
-        if raw.velocity > 2 then
-          "hourly"
-        else if raw.velocity > 0.5 then
-          "daily"
-        else if raw.velocity > 0.1 then
-          "weekly"
-        else
-          "infrequent"
-      ));
-    } // lib.optionalAttrs (raw.is_podcast or false) {
-      format = "podcast";
-    } // lib.optionalAttrs (raw.title or "" != "") {
-      title = lib.mkDefault raw.title;
-    };
-
-  podcasts = [
-    (fromDb "acquiredlpbonussecretsecret.libsyn.com" // tech)  # ACQ2 - more "Acquired" episodes
-    (fromDb "allinchamathjason.libsyn.com" // pol)
-    (fromDb "anchor.fm/s/34c7232c/podcast/rss" // tech)  # Civboot -- https://anchor.fm/civboot
-    (fromDb "cast.postmarketos.org" // tech)
-    (fromDb "congressionaldish.libsyn.com" // pol)  # Jennifer Briney
-    (fromDb "craphound.com" // pol)  # Cory Doctorow -- both podcast & text entries
-    (fromDb "darknetdiaries.com" // tech)
-    (fromDb "feed.podbean.com/matrixlive/feed.xml" // tech)  # Matrix (chat) Live
-    (fromDb "feeds.99percentinvisible.org/99percentinvisible" // pol)  # 99% Invisible -- also available here: <https://feeds.simplecast.com/BqbsxVfO>
-    (fromDb "feeds.feedburner.com/80000HoursPodcast" // rat)
-    (fromDb "feeds.feedburner.com/dancarlin/history" // rat)
-    (fromDb "feeds.feedburner.com/radiolab" // pol)  # Radiolab -- also available here, but ONLY OVER HTTP: <http://feeds.wnyc.org/radiolab>
-    (fromDb "feeds.libsyn.com/421877" // rat)  # Less Wrong Curated
-    (fromDb "feeds.megaphone.fm/behindthebastards" // pol)  # also Maggie Killjoy
-    (fromDb "feeds.megaphone.fm/hubermanlab" // uncat)  # Daniel Huberman on sleep
-    (fromDb "feeds.megaphone.fm/recodedecode" // tech)  # The Verge - Decoder
-    (fromDb "feeds.simplecast.com/54nAGcIl" // pol)  # The Daily
-    (fromDb "feeds.simplecast.com/82FI35Px" // pol)  # Ezra Klein Show
-    (fromDb "feeds.simplecast.com/wgl4xEgL" // rat)  # Econ Talk
-    (fromDb "feeds.simplecast.com/xKJ93w_w" // uncat)  # Atlas Obscura
-    (fromDb "feeds.transistor.fm/acquired" // tech)
-    (fromDb "lexfridman.com/podcast" // rat)
-    (fromDb "mapspodcast.libsyn.com" // uncat)  # Multidisciplinary Association for Psychedelic Studies
-    (fromDb "omegataupodcast.net" // tech)  # 3/4 German; 1/4 eps are English
-    (fromDb "omny.fm/shows/cool-people-who-did-cool-stuff" // pol)  # Maggie Killjoy -- referenced by Cory Doctorow
-    (fromDb "podcast.posttv.com/itunes/post-reports.xml" // pol)
-    (fromDb "podcast.thelinuxexp.com" // tech)
-    (fromDb "politicalorphanage.libsyn.com" // pol)
-    (fromDb "reverseengineering.libsyn.com/rss" // tech)  # UnNamed Reverse Engineering Podcast
-    (fromDb "rss.acast.com/deconstructed")  # The Intercept - Deconstructed
-    (fromDb "rss.acast.com/ft-tech-tonic" // tech)
-    (fromDb "rss.acast.com/intercepted-with-jeremy-scahill")  # The Intercept - Intercepted
-    (fromDb "rss.art19.com/60-minutes" // pol)
-    (fromDb "rss.art19.com/the-portal" // rat)  # Eric Weinstein
-    (fromDb "seattlenice.buzzsprout.com" // pol)
-    (fromDb "sharkbytes.transistor.fm" // tech)  # Wireshark Podcast o_0
-    (fromDb "sscpodcast.libsyn.com" // rat)  # Astral Codex Ten
-    (fromDb "talesfromthebridge.buzzsprout.com" // tech)  # Sci-Fi? has Peter Watts; author of No Moods, Ads or Cutesy Fucking Icons (rifters.com)
-    (fromDb "techwontsave.us" // pol)  # rec by Cory Doctorow
-    # (fromDb "trashfuturepodcast.podbean.com" // pol)  # rec by Cory Doctorow, but way rambly
-    (fromDb "wakingup.libsyn.com" // pol)  # Sam Harris
-    (fromDb "werenotwrong.fireside.fm" // pol)
-
-    # (fromDb "rss.art19.com/your-welcome" // pol)  # Michael Malice - Your Welcome -- also available here: <https://origin.podcastone.com/podcast?categoryID2=2232>
-    # (fromDb "rss.prod.firstlook.media/deconstructed/podcast.rss" // pol)  #< possible URL rot
-    # (fromDb "rss.prod.firstlook.media/intercepted/podcast.rss" // pol)  #< possible URL rot
-    # (mkPod "https://anchor.fm/s/21bc734/podcast/rss" // pol // infrequent)  # Emerge: making sense of what's next -- <https://www.whatisemerging.com/emergepodcast>
-    # (mkPod "https://audioboom.com/channels/5097784.rss" // tech)  # Lateral with Tom Scott
-    # (mkPod "https://feeds.megaphone.fm/RUNMED9919162779" // pol // infrequent)  # The Witch Trials of J.K. Rowling: <https://www.thefp.com/witchtrials>
-    # (mkPod "https://podcasts.la.utexas.edu/this-is-democracy/feed/podcast/" // pol // weekly)
-  ];
-
-  texts = [
-    # AGGREGATORS (> 1 post/day)
-    (fromDb "lwn.net" // tech)
-    # (fromDb "lesswrong.com" // rat)
-    # (fromDb "econlib.org" // pol)
-
-    # AGGREGATORS (< 1 post/day)
-    (fromDb "palladiummag.com" // uncat)
-    (fromDb "profectusmag.com" // uncat)
-    (fromDb "semiaccurate.com" // tech)
-    (mkText "https://linuxphoneapps.org/blog/atom.xml" // tech // infrequent)
-    (fromDb "tuxphones.com" // tech)
-    (fromDb "spectrum.ieee.org" // tech)
-    # (fromDb "theregister.com" // tech)
-    (fromDb "thisweek.gnome.org" // tech)
-    # more nixos stuff here, but unclear how to subscribe: <https://nixos.org/blog/categories.html>
-    (mkText "https://nixos.org/blog/announcements-rss.xml" // tech // infrequent)
-    (mkText "https://nixos.org/blog/stories-rss.xml" // tech // weekly)
-    ## n.b.: quality RSS list here: <https://forum.merveilles.town/thread/57/share-your-rss-feeds%21-6/>
-    (mkText "https://forum.merveilles.town/rss.xml" // pol // infrequent)
-
-    ## No Moods, Ads or Cutesy Fucking Icons
-    (fromDb "rifters.com/crawl" // uncat)
-
-    # DEVELOPERS
-    (fromDb "blog.jmp.chat" // tech)
-    (fromDb "uninsane.org" // tech)
-    (fromDb "ascii.textfiles.com" // tech)  # Jason Scott
-    (fromDb "xn--gckvb8fzb.com" // tech)
-    (fromDb "amosbbatto.wordpress.com" // tech)
-    (fromDb "fasterthanli.me" // tech)
-    (fromDb "mg.lol" // tech)
-    # (fromDb "drewdevault.com" // tech)
-    ## Ken Shirriff
-    (fromDb "righto.com" // tech)
-    ## shared blog by a few NixOS devs, notably onny
-    (fromDb "project-insanity.org" // tech)
-    ## Vitalik Buterin
-    (fromDb "vitalik.ca" // tech)
-    ## ian (Sanctuary)
-    (fromDb "sagacioussuricata.com" // tech)
-    (fromDb "artemis.sh" // tech)
-    ## Bunnie Juang
-    (fromDb "bunniestudios.com" // tech)
-    (fromDb "blog.danieljanus.pl" // tech)
-    (fromDb "ianthehenry.com" // tech)
-    (fromDb "bitbashing.io" // tech)
-    (fromDb "idiomdrottning.org" // uncat)
-    (mkText "http://boginjr.com/feed" // tech // infrequent)
-    (mkText "https://anish.lakhwara.com/home.html" // tech // weekly)
-    (fromDb "jefftk.com" // tech)
-    (fromDb "pomeroyb.com" // tech)
-    (fromDb "harihareswara.net" // tech // pol)  # rec by Cory Doctorow
-    (fromDb "mako.cc/copyrighteous" // tech // pol)  # rec by Cory Doctorow
-    # (mkText "https://til.simonwillison.net/tils/feed.atom" // tech // weekly)
-
-    # TECH PROJECTS
-    (fromDb "blog.rust-lang.org" // tech)
-
-    # (TECH; POL) COMMENTATORS
-    ## Matt Webb -- engineering-ish, but dreamy
-    (fromDb "interconnected.org/home/feed" // rat)
-    (fromDb "edwardsnowden.substack.com" // pol // text)
-    ## Julia Evans
-    (mkText "https://jvns.ca/atom.xml" // tech // weekly)
-    (mkText "http://benjaminrosshoffman.com/feed" // pol // weekly)
-    ## Ben Thompson
-    (mkText "https://www.stratechery.com/rss" // pol // weekly)
-    ## Balaji
-    (fromDb "balajis.com" // pol)
-    (fromDb "ben-evans.com/benedictevans" // pol)
-    (fromDb "lynalden.com" // pol)
-    (fromDb "austinvernon.site" // tech)
-    (mkSubstack "oversharing" // pol // daily)
-    (mkSubstack "byrnehobart" // pol // infrequent)
-    # (mkSubstack "doomberg" // tech // weekly)  # articles are all pay-walled
-    ## David Rosenthal
-    (fromDb "blog.dshr.org" // pol)
-    ## Matt Levine
-    (mkText "https://www.bloomberg.com/opinion/authors/ARbTQlRLRjE/matthew-s-levine.rss" // pol // weekly)
-    (fromDb "stpeter.im/atom.xml" // pol)
-    ## Peter Saint-Andre -- side project of stpeter.im
-    (fromDb "philosopher.coach" // rat)
-    (fromDb "morningbrew.com/feed" // pol)
-
-    # RATIONALITY/PHILOSOPHY/ETC
-    (mkSubstack "samkriss" // humor // infrequent)
-    (fromDb "unintendedconsequenc.es" // rat)
-    (fromDb "applieddivinitystudies.com" // rat)
-    (fromDb "slimemoldtimemold.com" // rat)
-    (fromDb "richardcarrier.info" // rat)
-    (fromDb "gwern.net" // rat)
-    ## Jason Crawford
-    (fromDb "rootsofprogress.org" // rat)
-    ## Robin Hanson
-    (fromDb "overcomingbias.com" // rat)
-    ## Scott Alexander
-    (mkSubstack "astralcodexten" // rat // daily)
-    ## Paul Christiano
-    (fromDb "sideways-view.com" // rat)
-    ## Sean Carroll
-    (fromDb "preposterousuniverse.com" // rat)
-    (mkSubstack "eliqian" // rat // weekly)
-    (mkText "https://acoup.blog/feed" // rat // weekly)
-    (fromDb "mindingourway.com" // rat)
-
-    ## mostly dating topics. not advice, or humor, but looking through a social lens
-    (fromDb "putanumonit.com" // rat)
-
-    # LOCAL
-    (fromDb "capitolhillseattle.com" // pol)
-
-    # CODE
-    # (mkText "https://github.com/Kaiteki-Fedi/Kaiteki/commits/master.atom" // tech // infrequent)
-  ];
-
-  images = [
-    (fromDb "smbc-comics.com" // img // humor)
-    (fromDb "xkcd.com" // img // humor)
-    (fromDb "turnoff.us" // img // humor)
-    (fromDb "pbfcomics.com" // img // humor)
-    # (mkImg "http://dilbert.com/feed" // humor // daily)
-    (fromDb "poorlydrawnlines.com/feed" // img // humor)
-
-    # ART
-    (fromDb "miniature-calendar.com" // img // art // daily)
-  ];
-in
-{
-  sane.feeds = texts ++ images ++ podcasts;
-
-  assertions = builtins.map
-    (p: {
-      assertion = p.format or "unknown" == "podcast";
-      message = ''${p.url} is not a podcast: ${p.format or "unknown"}'';
-    })
-    podcasts;
-}
--- a/hosts/common/fs.nix
+++ b/hosts/common/fs.nix
@@ -1,143 +0,0 @@
-# docs
-# - x-systemd options: <https://www.freedesktop.org/software/systemd/man/systemd.mount.html>
-
-{ lib, pkgs, sane-lib, ... }:
-
-let
-  fsOpts = rec {
-    common = [
-      "_netdev"
-      "noatime"
-      "user"  # allow any user with access to the device to mount the fs
-      "x-systemd.requires=network-online.target"
-      "x-systemd.after=network-online.target"
-      "x-systemd.mount-timeout=10s"  # how long to wait for mount **and** how long to wait for unmount
-    ];
-    auto = [ "x-systemd.automount" ];
-    noauto = [ "noauto" ];  # don't mount as part of remote-fs.target
-    wg = [
-      "x-systemd.requires=wireguard-wg-home.service"
-      "x-systemd.after=wireguard-wg-home.service"
-    ];
-
-    ssh = common ++ [
-      "identityfile=/home/colin/.ssh/id_ed25519"
-      "allow_other"
-      "default_permissions"
-    ];
-    sshColin = ssh ++ [
-      "transform_symlinks"
-      "idmap=user"
-      "uid=1000"
-      "gid=100"
-    ];
-    sshRoot = ssh ++ [
-      # we don't transform_symlinks because that breaks the validity of remote /nix stores
-      "sftp_server=/run/wrappers/bin/sudo\\040/run/current-system/sw/libexec/sftp-server"
-    ];
-    # in the event of hunt NFS mounts, consider:
-    # - <https://unix.stackexchange.com/questions/31979/stop-broken-nfs-mounts-from-locking-a-directory>
-
-    # NFS options: <https://linux.die.net/man/5/nfs>
-    # actimeo=n  = how long (in seconds) to cache file/dir attributes (default: 3-60s)
-    # bg         = retry failed mounts in the background
-    # retry=n    = for how many minutes `mount` will retry NFS mount operation
-    # soft       = on "major timeout", report I/O error to userspace
-    # retrans=n  = how many times to retry a NFS request before giving userspace a "server not responding" error (default: 3)
-    # timeo=n    = number of *deciseconds* to wait for a response before retrying it (default: 600)
-    #              note: client uses a linear backup, so the second request will have double this timeout, then triple, etc.
-    nfs = common ++ [
-      # "actimeo=10"
-      "bg"
-      "retrans=4"
-      "retry=0"
-      "soft"
-      "timeo=15"
-      "nofail"  # don't fail remote-fs.target when this mount fails  (not an option for sshfs else would be common)
-    ];
-  };
-  remoteHome = host: {
-    fileSystems."/mnt/${host}-home" = {
-      device = "colin@${host}:/home/colin";
-      fsType = "fuse.sshfs";
-      options = fsOpts.sshColin ++ fsOpts.noauto;
-      noCheck = true;
-    };
-    sane.fs."/mnt/${host}-home" = sane-lib.fs.wantedDir;
-  };
-in
-lib.mkMerge [
-  {
-    # some services which use private directories error if the parent (/var/lib/private) isn't 700.
-    sane.fs."/var/lib/private".dir.acl.mode = "0700";
-
-    # in-memory compressed RAM
-    # defaults to compressing at most 50% size of RAM
-    # claimed compression ratio is about 2:1
-    # - but on moby w/ zstd default i see 4-7:1  (ratio lowers as it fills)
-    # note that idle overhead is about 0.05% of capacity (e.g. 2B per 4kB page)
-    # docs: <https://www.kernel.org/doc/Documentation/blockdev/zram.txt>
-    #
-    # to query effectiveness:
-    # `cat /sys/block/zram0/mm_stat`. whitespace separated fields:
-    # - *orig_data_size*  (bytes)
-    # - *compr_data_size* (bytes)
-    # - mem_used_total    (bytes)
-    # - mem_limit         (bytes)
-    # - mem_used_max      (bytes)
-    # - *same_pages*  (pages which are e.g. all zeros (consumes no additional mem))
-    # - *pages_compacted*  (pages which have been freed thanks to compression)
-    # - huge_pages  (incompressible)
-    #
-    # see also:
-    # - `man zramctl`
-    zramSwap.enable = true;
-    # how much ram can be swapped into the zram device.
-    # this shouldn't be higher than the observed compression ratio.
-    # the default is 50% (why?)
-    # 100% should be "guaranteed" safe so long as the data is even *slightly* compressible.
-    # but it decreases working memory under the heaviest of loads by however much space the compressed memory occupies (e.g. 50% if 2:1; 25% if 4:1)
-    zramSwap.memoryPercent = 100;
-
-    # fileSystems."/mnt/servo-nfs" = {
-    #   device = "servo-hn:/";
-    #   noCheck = true;
-    #   fsType = "nfs";
-    #   options = fsOpts.nfs ++ fsOpts.auto ++ fsOpts.wg;
-    # };
-    fileSystems."/mnt/servo-nfs/media" = {
-      device = "servo-hn:/media";
-      noCheck = true;
-      fsType = "nfs";
-      options = fsOpts.nfs ++ fsOpts.auto ++ fsOpts.wg;
-    };
-    fileSystems."/mnt/servo-nfs/playground" = {
-      device = "servo-hn:/playground";
-      noCheck = true;
-      fsType = "nfs";
-      options = fsOpts.nfs ++ fsOpts.auto ++ fsOpts.wg;
-    };
-    # fileSystems."/mnt/servo-media-nfs" = {
-    #   device = "servo-hn:/media";
-    #   noCheck = true;
-    #   fsType = "nfs";
-    #   options = fsOpts.common ++ fsOpts.auto;
-    # };
-    sane.fs."/mnt/servo-media" = sane-lib.fs.wantedSymlinkTo "/mnt/servo-nfs/media";
-
-    environment.pathsToLink = [
-      # needed to achieve superuser access for user-mounted filesystems (see optionsRoot above)
-      # we can only link whole directories here, even though we're only interested in pkgs.openssh
-      "/libexec"
-    ];
-
-    environment.systemPackages = [
-      pkgs.sshfs-fuse
-    ];
-  }
-
-  (remoteHome "desko")
-  (remoteHome "lappy")
-  (remoteHome "moby")
-]
-
--- a/hosts/common/hardware/default.nix
+++ b/hosts/common/hardware/default.nix
@@ -1,73 +0,0 @@
-{ lib, pkgs, ... }:
-
-{
-  imports = [
-    ./x86_64.nix
-  ];
-
-  boot.initrd.supportedFilesystems = [ "ext4" "btrfs" "ext2" "ext3" "vfat" ];
-  # useful emergency utils
-  boot.initrd.extraUtilsCommands = ''
-    copy_bin_and_libs ${pkgs.btrfs-progs}/bin/btrfstune
-    copy_bin_and_libs ${pkgs.util-linux}/bin/{cfdisk,lsblk,lscpu}
-    copy_bin_and_libs ${pkgs.gptfdisk}/bin/{cgdisk,gdisk}
-    copy_bin_and_libs ${pkgs.smartmontools}/bin/smartctl
-    copy_bin_and_libs ${pkgs.nvme-cli}/bin/nvme
-    copy_bin_and_libs ${pkgs.e2fsprogs}/bin/resize2fs
-  '';
-  boot.kernelParams = [
-    "boot.shell_on_fail"
-    #v experimental full pre-emption for hopefully better call/audio latency on moby.
-    # also toggleable at runtime via /sys/kernel/debug/sched/preempt
-    # defaults to preempt=voluntary
-    # "preempt=full"
-  ];
-  # other kernelParams:
-  #   "boot.trace"
-  #   "systemd.log_level=debug"
-  #   "systemd.log_target=console"
-
-  # hack in the `boot.shell_on_fail` arg since that doesn't always seem to work.
-  boot.initrd.preFailCommands = "allowShell=1";
-
-  # default: 4 (warn). 7 is debug
-  boot.consoleLogLevel = 7;
-
-  boot.loader.grub.enable = lib.mkDefault false;
-  boot.loader.generic-extlinux-compatible.enable = lib.mkDefault true;
-
-  # non-free firmware
-  hardware.enableRedistributableFirmware = true;
-
-  # powertop will default to putting USB devices -- including HID -- to sleep after TWO SECONDS
-  powerManagement.powertop.enable = false;
-  # linux CPU governor: <https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt>
-  # - options:
-  #   - "powersave" => force CPU to always run at lowest supported frequency
-  #   - "performance" => force CPU to always run at highest frequency
-  #   - "ondemand" => adjust frequency based on load
-  #   - "conservative"  (ondemand but slower to adjust)
-  #   - "schedutil"
-  #   - "userspace"
-  # - not all options are available for all platforms
-  #   - intel (intel_pstate) appears to manage scaling w/o intervention/control from the OS.
-  #   - AMD (acpi-cpufreq) appears to manage scaling via the OS *or* HW. but the ondemand defaults never put it to max hardware frequency.
-  #   - qualcomm (cpufreq-dt) appears to manage scaling *only* via the OS. ondemand governor exercises the full range.
-  # - query details with `sudo cpupower frequency-info`
-  powerManagement.cpuFreqGovernor = "ondemand";
-
-  services.logind.extraConfig = ''
-    # don’t shutdown when power button is short-pressed
-    HandlePowerKey=ignore
-  '';
-
-  # services.snapper.configs = {
-  #   root = {
-  #     subvolume = "/";
-  #     extraConfig = {
-  #       ALLOW_USERS = "colin";
-  #     };
-  #   };
-  # };
-  # services.snapper.snapshotInterval = "daily";
-}
--- a/hosts/common/home/default.nix
+++ b/hosts/common/home/default.nix
@@ -1,9 +0,0 @@
-{ ... }:
-{
-  imports = [
-    ./keyring
-    ./mime.nix
-    ./ssh.nix
-    ./xdg-dirs.nix
-  ];
-}
--- a/hosts/common/home/keyring/default.nix
+++ b/hosts/common/home/keyring/default.nix
@@ -1,17 +0,0 @@
-{ config, pkgs, sane-lib, ... }:
-
-let
-  init-keyring = pkgs.static-nix-shell.mkBash {
-    pname = "init-keyring";
-    src = ./.;
-  };
-in
-{
-  sane.user.persist.byStore.private = [ ".local/share/keyrings" ];
-
-  sane.user.fs."private/.local/share/keyrings/default" = {
-    generated.command = [ "${init-keyring}/bin/init-keyring" ];
-    wantedBy = [ config.sane.fs."/home/colin/private".unit ];
-    wantedBeforeBy = [ ];  # don't created this as part of `multi-user.target`
-  };
-}
--- a/hosts/common/home/keyring/init-keyring
+++ b/hosts/common/home/keyring/init-keyring
@@ -1,21 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash
-# initializes the default libsecret keyring (used by gnome-keyring) if not already initialized.
-# this initializes it to be plaintext/unencrypted.
-
-ringdir=/home/colin/private/.local/share/keyrings
-if test -f "$ringdir/default"
-then
-  echo 'keyring already initialized: not doing anything'
-else
-  keyring="$ringdir/Default_keyring.keyring"
-
-  echo 'initializing default user keyring:' "$keyring.new"
-  echo '[keyring]' > "$keyring.new"
-  echo 'display-name=Default keyring' >> "$keyring.new"
-  echo 'lock-on-idle=false' >> "$keyring.new"
-  echo 'lock-after=false' >> "$keyring.new"
-  chown colin:users "$keyring.new"
-  # closest to an atomic update we can achieve
-  mv "$keyring.new" "$keyring" && echo -n "Default_keyring" > "$ringdir/default"
-fi
--- a/hosts/common/home/mime.nix
+++ b/hosts/common/home/mime.nix
@@ -1,28 +0,0 @@
-{ config, lib, ...}:
-
-let
-  # ProgramConfig -> { "<mime-type>" = { priority, desktop }; }
-  weightedMimes = prog: builtins.mapAttrs (_key: desktop: { priority = prog.mime.priority; desktop = desktop; }) prog.mime.associations;
-  # [ { "<mime-type>" = { priority, desktop } ]; } ] -> { "<mime-type>" = [ { priority, desktop } ... ]; }
-  mergeMimes = mimes: lib.foldAttrs (item: acc: [item] ++ acc) [] mimes;
-  # [ { priority, desktop } ... ] -> Self
-  sortOneMimeType = associations: builtins.sort (l: r: assert l.priority != r.priority; l.priority < r.priority) associations;
-  sortMimes = mimes: builtins.mapAttrs (_k: sortOneMimeType) mimes;
-  removePriorities = mimes: builtins.mapAttrs (_k: associations: builtins.map (a: a.desktop) associations) mimes;
-
-  # [ ProgramConfig ]
-  enabledPrograms = builtins.filter (p: p.enabled) (builtins.attrValues config.sane.programs);
-  # [ { "<mime-type>" = { prority, desktop } ]
-  enabledWeightedMimes = builtins.map weightedMimes enabledPrograms;
-in
-{
-  # the xdg mime type for a file can be found with:
-  # - `xdg-mime query filetype path/to/thing.ext`
-  # the default handler for a mime type can be found with:
-  # - `xdg-mime query default <mimetype>`  (e.g. x-scheme-handler/http)
-  #
-  # we can have single associations or a list of associations.
-  # there's also options to *remove* [non-default] associations from specific apps
-  xdg.mime.enable = true;
-  xdg.mime.defaultApplications = removePriorities (sortMimes (mergeMimes enabledWeightedMimes));
-}
--- a/hosts/common/home/ssh.nix
+++ b/hosts/common/home/ssh.nix
@@ -1,29 +0,0 @@
-# TODO: this should be moved to users/colin.nix
-{ config, lib, ... }:
-
-let
-  host = config.networking.hostName;
-  user-pubkey-full = config.sane.ssh.pubkeys."colin@${host}" or {};
-  user-pubkey = user-pubkey-full.asUserKey or null;
-  host-keys = lib.filter (k: k.user == "root") (lib.attrValues config.sane.ssh.pubkeys);
-  known-hosts-text = lib.concatStringsSep
-    "\n"
-    (builtins.map (k: k.asHostKey) host-keys)
-  ;
-in
-{
-  # ssh key is stored in private storage
-  sane.user.persist.byStore.private = [
-    { type = "file"; path = ".ssh/id_ed25519"; }
-  ];
-  sane.user.fs.".ssh/id_ed25519.pub" = lib.mkIf (user-pubkey != null) {
-    symlink.text = user-pubkey;
-  };
-  sane.user.fs.".ssh/known_hosts".symlink.text = known-hosts-text;
-
-  users.users.colin.openssh.authorizedKeys.keys =
-  let
-    user-keys = lib.filter (k: k.user == "colin") (lib.attrValues config.sane.ssh.pubkeys);
-  in
-    builtins.map (k: k.asUserKey) user-keys;
-}
--- a/hosts/common/home/xdg-dirs.nix
+++ b/hosts/common/home/xdg-dirs.nix
@@ -1,20 +0,0 @@
-{ ... }:
-
-{
-  # XDG defines things like ~/Desktop, ~/Downloads, etc.
-  # these clutter the home, so i mostly don't use them.
-  sane.user.fs.".config/user-dirs.dirs".symlink.text = ''
-    XDG_DESKTOP_DIR="$HOME/.xdg/Desktop"
-    XDG_DOCUMENTS_DIR="$HOME/dev"
-    XDG_DOWNLOAD_DIR="$HOME/tmp"
-    XDG_MUSIC_DIR="$HOME/Music"
-    XDG_PICTURES_DIR="$HOME/Pictures"
-    XDG_PUBLICSHARE_DIR="$HOME/.xdg/Public"
-    XDG_TEMPLATES_DIR="$HOME/.xdg/Templates"
-    XDG_VIDEOS_DIR="$HOME/Videos"
-  '';
-
-  # prevent `xdg-user-dirs-update` from overriding/updating our config
-  # see <https://manpages.ubuntu.com/manpages/bionic/man5/user-dirs.conf.5.html>
-  sane.user.fs.".config/user-dirs.conf".symlink.text = "enabled=False";
-}
--- a/hosts/common/hosts.nix
+++ b/hosts/common/hosts.nix
@@ -1,39 +0,0 @@
-{ lib, ... }:
-
-{
-  # TODO: this should be populated per-host
-  sane.hosts.by-name."desko" = {
-    ssh.user_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPU5GlsSfbaarMvDA20bxpSZGWviEzXGD8gtrIowc1pX";
-    ssh.host_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFw9NoRaYrM6LbDd3aFBc4yyBlxGQn8HjeHd/dZ3CfHk";
-    wg-home.pubkey = "17PMZssYi0D4t2d0vbmhjBKe1sGsE8kT8/dod0Q2CXc=";
-    wg-home.ip = "10.0.10.22";
-    lan-ip = "10.78.79.52";
-  };
-
-  sane.hosts.by-name."lappy" = {
-    ssh.user_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDpmFdNSVPRol5hkbbCivRhyeENzb9HVyf9KutGLP2Zu";
-    ssh.host_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILSJnqmVl9/SYQ0btvGb0REwwWY8wkdkGXQZfn/1geEc";
-    wg-home.pubkey = "FTUWGw2p4/cEcrrIE86PWVnqctbv8OYpw8Gt3+dC/lk=";
-    wg-home.ip = "10.0.10.20";
-    lan-ip = "10.78.79.53";
-  };
-
-  sane.hosts.by-name."moby" = {
-    ssh.authorized = lib.mkDefault false;  # moby's too easy to hijack: don't let it ssh places
-    ssh.user_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICrR+gePnl0nV/vy7I5BzrGeyVL+9eOuXHU1yNE3uCwU";
-    ssh.host_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO1N/IT3nQYUD+dBlU1sTEEVMxfOyMkrrDeyHcYgnJvw";
-    wg-home.pubkey = "I7XIR1hm8bIzAtcAvbhWOwIAabGkuEvbWH/3kyIB1yA=";
-    wg-home.ip = "10.0.10.48";
-    lan-ip = "10.78.79.54";
-  };
-
-  sane.hosts.by-name."servo" = {
-    ssh.authorized = lib.mkDefault false;  # servo presents too many services to the internet: easy atack vector
-    ssh.user_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPS1qFzKurAdB9blkWomq8gI1g0T3sTs9LsmFOj5VtqX";
-    ssh.host_pubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOfdSmFkrVT6DhpgvFeQKm3Fh9VKZ9DbLYOPOJWYQ0E8";
-    wg-home.pubkey = "roAw+IUFVtdpCcqa4khB385Qcv9l5JAB//730tyK4Wk=";
-    wg-home.ip = "10.0.10.5";
-    wg-home.endpoint = "uninsane.org:51820";
-    lan-ip = "10.78.79.51";
-  };
-}
--- a/hosts/common/ids.nix
+++ b/hosts/common/ids.nix
@@ -1,93 +0,0 @@
-# TODO: migrate to nixpkgs `config.ids.uids`
-# - note that nixpkgs' `config.ids.uids` is strictly a database: it doesn't set anything by default
-#   whereas our impl sets the gid/uid of the user/group specified if they exist.
-{ ... }:
-
-{
-  # legacy servo users, some are inconvenient to migrate
-  sane.ids.dhcpcd.gid = 991;
-  sane.ids.dhcpcd.uid = 992;
-  sane.ids.gitea.gid = 993;
-  sane.ids.git.uid = 994;
-  sane.ids.jellyfin.gid = 994;
-  sane.ids.pleroma.gid = 995;
-  sane.ids.jellyfin.uid = 996;
-  sane.ids.acme.gid = 996;
-  sane.ids.pleroma.uid = 997;
-  sane.ids.acme.uid = 998;
-  sane.ids.matrix-appservice-irc.uid = 993;
-  sane.ids.matrix-appservice-irc.gid = 992;
-
-  # greetd (used by sway)
-  sane.ids.greeter.uid = 999;
-  sane.ids.greeter.gid = 999;
-
-  # new servo users
-  sane.ids.freshrss.uid = 2401;
-  sane.ids.freshrss.gid = 2401;
-  sane.ids.mediawiki.uid = 2402;
-  sane.ids.signald.uid = 2403;
-  sane.ids.signald.gid = 2403;
-  sane.ids.mautrix-signal.uid = 2404;
-  sane.ids.mautrix-signal.gid = 2404;
-  sane.ids.navidrome.uid = 2405;
-  sane.ids.navidrome.gid = 2405;
-  sane.ids.calibre-web.uid = 2406;
-  sane.ids.calibre-web.gid = 2406;
-  sane.ids.komga.uid = 2407;
-  sane.ids.komga.gid = 2407;
-  sane.ids.lemmy.uid = 2408;
-  sane.ids.lemmy.gid = 2408;
-  sane.ids.pict-rs.uid = 2409;
-  sane.ids.pict-rs.gid = 2409;
-  sane.ids.sftpgo.uid = 2410;
-  sane.ids.sftpgo.gid = 2410;
-  sane.ids.trust-dns.uid = 2411;
-  sane.ids.trust-dns.gid = 2411;
-  sane.ids.export.gid = 2412;
-  sane.ids.nfsuser.uid = 2413;
-  sane.ids.media.gid = 2414;
-  sane.ids.ntfy-sh.uid = 2415;
-  sane.ids.ntfy-sh.gid = 2415;
-
-  sane.ids.colin.uid = 1000;
-  sane.ids.guest.uid = 1100;
-
-  # found on all hosts
-  sane.ids.sshd.uid = 2001;  # 997
-  sane.ids.sshd.gid = 2001;  # 997
-  sane.ids.polkituser.gid = 2002;  # 998
-  sane.ids.systemd-coredump.gid = 2003;  # 996  # 2023/02/12-2023/02/28: upstream temporarily specified this as 151
-  sane.ids.nscd.uid = 2004;
-  sane.ids.nscd.gid = 2004;
-  sane.ids.systemd-oom.uid = 2005;
-  sane.ids.systemd-oom.gid = 2005;
-  sane.ids.wireshark.gid = 2006;
-
-  # found on graphical hosts
-  sane.ids.nm-iodine.uid = 2101;  # desko/moby/lappy
-
-  # found on desko host
-  # from services.usbmuxd
-  sane.ids.usbmux.uid = 2204;
-  sane.ids.usbmux.gid = 2204;
-
-
-  # originally found on moby host
-  # gnome core-shell
-  sane.ids.avahi.uid = 2304;
-  sane.ids.avahi.gid = 2304;
-  sane.ids.colord.uid = 2305;
-  sane.ids.colord.gid = 2305;
-  sane.ids.geoclue.uid = 2306;
-  sane.ids.geoclue.gid = 2306;
-  # gnome core-os-services
-  sane.ids.rtkit.uid = 2307;
-  sane.ids.rtkit.gid = 2307;
-  # phosh
-  sane.ids.feedbackd.gid = 2308;
-
-  # new moby users
-  sane.ids.eg25-control.uid = 2309;
-  sane.ids.eg25-control.gid = 2309;
-}
--- a/hosts/common/machine-id.nix
+++ b/hosts/common/machine-id.nix
@@ -1,16 +0,0 @@
-{ ... }:
-{
-  # /etc/machine-id is a globally unique identifier used for:
-  # - systemd-networkd: DHCP lease renewal (instead of keying by the MAC address)
-  # - systemd-journald: to filter logs by host
-  # - chromium (potentially to track re-installations)
-  # - gdbus; system services that might upgrade to AF_LOCAL if both services can confirm they're on the same machine
-  # because of e.g. the chromium use, we *don't want* to persist this.
-  # however, `journalctl` won't show logs from previous boots unless the machine-ids match.
-  # so for now, generate something unique from the host ssh key.
-  # TODO: move this into modules?
-  system.activationScripts.machine-id = {
-    deps = [ "etc" ];
-    text = "sha256sum /etc/ssh/host_keys/ssh_host_ed25519_key | cut -c 1-32 > /etc/machine-id";
-  };
-}
--- a/hosts/common/net.nix
+++ b/hosts/common/net.nix
@@ -1,47 +0,0 @@
-{ lib, ... }:
-
-{
-  # the default backend is "wpa_supplicant".
-  # wpa_supplicant reliably picks weak APs to connect to.
-  # see: <https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/474>
-  # iwd is an alternative that shouldn't have this problem
-  # docs:
-  # - <https://nixos.wiki/wiki/Iwd>
-  # - <https://iwd.wiki.kernel.org/networkmanager>
-  # - `man iwd.config`  for global config
-  # - `man iwd.network` for per-SSID config
-  # use `iwctl` to control
-  # networking.networkmanager.wifi.backend = "iwd";
-  # networking.wireless.iwd.enable = true;
-  # networking.wireless.iwd.settings = {
-  #   # auto-connect to a stronger network if signal drops below this value
-  #   # bedroom -> bedroom connection is -35 to -40 dBm
-  #   # bedroom -> living room connection is -60 dBm
-  #   General.RoamThreshold = "-52";  # default -70
-  #   General.RoamThreshold5G = "-52";  # default -76
-  # };
-
-  # plugins mostly add support for establishing different VPN connections.
-  # the default plugin set includes mostly proprietary VPNs:
-  # - fortisslvpn (Fortinet)
-  # - iodine (DNS tunnels)
-  # - l2tp
-  # - openconnect (Cisco Anyconnect / Juniper / ocserv)
-  # - openvpn
-  # - vpnc (Cisco VPN)
-  # - sstp
-  #
-  # i don't use these, and notably they drag in huge dependency sets and don't cross compile well.
-  # e.g. openconnect drags in webkitgtk (for SSO)!
-  networking.networkmanager.plugins = lib.mkForce [];
-
-  networking.firewall.allowedUDPPorts = [
-    1900  # to received UPnP advertisements. required by sane-ip-check-upnp
-  ];
-
-  # keyfile.path = where networkmanager should look for connection credentials
-  networking.networkmanager.extraConfig = ''
-    [keyfile]
-    path=/var/lib/NetworkManager/system-connections
-  '';
-}
--- a/hosts/common/nix-path/default.nix
+++ b/hosts/common/nix-path/default.nix
@@ -1,13 +0,0 @@
-{ pkgs, ... }:
-
-{
-  # allow `nix-shell` (and probably nix-index?) to locate our patched and custom packages
-  nix.nixPath = [
-    "nixpkgs=${pkgs.path}"
-    # note the import starts at repo root: this allows `./overlay/default.nix` to access the stuff at the root
-    # "nixpkgs-overlays=${../../..}/hosts/common/nix-path/overlay"
-    # as long as my system itself doesn't rely on NIXPKGS at runtime, we can point the overlays to git
-    # to avoid switching so much during development
-    "nixpkgs-overlays=/home/colin/dev/nixos/hosts/common/nix-path/overlay"
-  ];
-}
--- a/hosts/common/nix-path/overlay/default.nix
+++ b/hosts/common/nix-path/overlay/default.nix
@@ -1,4 +0,0 @@
-# XXX: NIX_PATH=...:nixpkgs-overlays=... will import every overlay in the directory
-# so we prefer to give it a directory with just this *one* overlay, otherwise it imports conflicting overlays
-# and gets stuck in a loop until it OOMs
-import ../../../../overlays/all.nix
--- a/hosts/common/persist.nix
+++ b/hosts/common/persist.nix
@@ -1,16 +0,0 @@
-{ ... }:
-
-{
-  sane.persist.stores.private.origin = "/home/colin/private";
-  # store /home/colin/a/b in /home/private/a/b instead of /home/private/home/colin/a/b
-  sane.persist.stores.private.prefix = "/home/colin";
-
-  sane.persist.sys.byStore.plaintext = [
-    # TODO: these should be private.. somehow
-    "/var/log"
-    "/var/backup"  # for e.g. postgres dumps
-  ];
-  sane.persist.sys.byStore.cryptClearOnBoot = [
-    "/var/lib/systemd/coredump"
-  ];
-}
--- a/hosts/common/programs/aerc.nix
+++ b/hosts/common/programs/aerc.nix
@@ -1,9 +0,0 @@
-# Terminal UI mail client
-{ ... }:
-
-{
-  sane.programs.aerc = {
-    secrets.".config/aerc/accounts.conf" = ../../../secrets/common/aerc_accounts.conf.bin;
-    mime.associations."x-scheme-handler/mailto" = "aerc.desktop";
-  };
-}
--- a/hosts/common/programs/alacritty.nix
+++ b/hosts/common/programs/alacritty.nix
@@ -1,24 +0,0 @@
-# alacritty terminal emulator
-# - config options: <https://github.com/alacritty/alacritty/blob/master/extra/man/alacritty.5.scd>
-#   - `man 5 alacritty`
-#   - defaults: <https://github.com/alacritty/alacritty/releases>  -> alacritty.yml
-# - irc: #alacritty on libera.chat
-{ lib, ... }:
-{
-  sane.programs.alacritty = {
-    env.TERMINAL = lib.mkDefault "alacritty";
-    # note: alacritty will switch to .toml config in 13.0 release
-    # - run `alacritty migrate` to convert the yaml to toml
-    fs.".config/alacritty/alacritty.yml".symlink.text = ''
-      font:
-        size: 14
-
-      key_bindings:
-        - { key: N,         mods: Control,        action: CreateNewWindow }
-        - { key: PageUp,    mods: Control,        action: ScrollPageUp }
-        - { key: PageDown,  mods: Control,        action: ScrollPageDown }
-        - { key: PageUp,    mods: Control|Shift,  action: ScrollPageUp }
-        - { key: PageDown,  mods: Control|Shift,  action: ScrollPageDown }
-    '';
-  };
-}
--- a/hosts/common/programs/assorted.nix
+++ b/hosts/common/programs/assorted.nix
@@ -1,277 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  declPackageSet = pkgs: {
-    package = null;
-    suggestedPrograms = pkgs;
-  };
-in
-{
-  sane.programs = {
-    # PACKAGE SETS
-    "sane-scripts.backup" = declPackageSet [
-      "sane-scripts.backup-ls"
-      "sane-scripts.backup-restore"
-    ];
-    "sane-scripts.bittorrent" = declPackageSet [
-      "sane-scripts.bt-add"
-      "sane-scripts.bt-rm"
-      "sane-scripts.bt-search"
-      "sane-scripts.bt-show"
-    ];
-    "sane-scripts.dev" = declPackageSet [
-      "sane-scripts.dev-cargo-loop"
-      "sane-scripts.git-init"
-    ];
-    "sane-scripts.cli" = declPackageSet [
-      "sane-scripts.deadlines"
-      "sane-scripts.find-dotfiles"
-      "sane-scripts.ip-check"
-      "sane-scripts.ip-reconnect"
-      "sane-scripts.private-change-passwd"
-      "sane-scripts.private-do"
-      "sane-scripts.private-init"
-      "sane-scripts.private-lock"
-      "sane-scripts.private-unlock"
-      "sane-scripts.rcp"
-      "sane-scripts.reboot"
-      "sane-scripts.reclaim-boot-space"
-      "sane-scripts.reclaim-disk-space"
-      "sane-scripts.secrets-dump"
-      "sane-scripts.secrets-unlock"
-      "sane-scripts.secrets-update-keys"
-      "sane-scripts.shutdown"
-      "sane-scripts.ssl-dump"
-      "sane-scripts.sudo-redirect"
-      "sane-scripts.sync-from-servo"
-      "sane-scripts.vpn"
-      "sane-scripts.which"
-      "sane-scripts.wipe-browser"
-      "sane-scripts.wipe-flare"
-      "sane-scripts.wipe-fractal"
-    ];
-    "sane-scripts.sys-utils" = declPackageSet [
-      "sane-scripts.ip-port-forward"
-      "sane-scripts.sync-music"
-    ];
-
-
-    sysadminUtils = declPackageSet [
-      "btrfs-progs"
-      "cacert.unbundled"  # some services require unbundled /etc/ssl/certs
-      "cryptsetup"
-      "ddrescue"
-      "dig"
-      "dtc"  # device tree [de]compiler
-      "e2fsprogs"  # resize2fs
-      "efibootmgr"
-      "ethtool"
-      "fatresize"
-      "fd"
-      "file"
-      # "fwupd"
-      "gawk"
-      "gdb"  # to debug segfaults
-      "git"
-      "gptfdisk"  # gdisk
-      "hdparm"
-      "htop"
-      "iftop"
-      "inetutils"  # for telnet
-      "iotop"
-      "iptables"
-      "iw"
-      "jq"
-      "killall"
-      "lsof"
-      "miniupnpc"
-      "nano"
-      #  "ncdu"  # ncurses disk usage. doesn't cross compile (zig)
-      "neovim"
-      "netcat"
-      "nethogs"
-      "nmap"
-      "nvme-cli"  # nvme
-      "openssl"
-      "parted"
-      "pciutils"
-      "powertop"
-      "pstree"
-      "ripgrep"
-      "screen"
-      "smartmontools"  # smartctl
-      "socat"
-      "strace"
-      "subversion"
-      "tcpdump"
-      "tree"
-      "usbutils"
-      "util-linux"  # lsblk, lscpu, etc
-      "wget"
-      "wirelesstools"  # iwlist
-    ];
-    sysadminExtraUtils = declPackageSet [
-      "backblaze-b2"
-      "duplicity"
-      "sane-scripts.backup"
-      "sqlite"  # to debug sqlite3 databases
-    ];
-
-    # TODO: split these into smaller groups.
-    # - moby doesn't want a lot of these.
-    # - categories like
-    #   - dev?
-    #   - debugging?
-    consoleUtils = declPackageSet [
-      "alsaUtils"  # for aplay, speaker-test
-      "binutils-unwrapped"  # for strings; though this brings 80MB of unrelated baggage too
-      # "cdrtools"
-      "clinfo"
-      "dmidecode"
-      "dtrx"  # `unar` alternative, "Do The Right eXtraction"
-      "efivar"
-      "eza"  # a better 'ls'
-      # "flashrom"
-      "git"  # needed as a user package, for config.
-      # "gnupg"
-      # "gocryptfs"
-      # "gopass"
-      # "gopass-jsonapi"
-      "helix"  # text editor
-      "libsecret"  # for managing user keyrings. TODO: what needs this? lift into the consumer
-      "lm_sensors"  # for sensors-detect. TODO: what needs this? lift into the consumer
-      "lshw"
-      # "memtester"
-      "mercurial"  # hg
-      "neovim"  # needed as a user package, for swap persistence
-      # "nettools"
-      # "networkmanager"
-      # "nixos-generators"
-      "nmon"
-      # "node2nix"
-      # "oathToolkit"  # for oathtool
-      # "ponymix"
-      "pulsemixer"
-      "python3-repl"
-      # "python3Packages.eyeD3"  # music tagging
-      "ripgrep"  # needed as a user package so that its user-level config file can be installed
-      "rsync"
-      "sane-scripts.bittorrent"
-      "sane-scripts.cli"
-      "snapper"
-      "sops"
-      "speedtest-cli"
-      # "ssh-to-age"
-      "sudo"
-      # "tageditor"  # music tagging
-      # "unar"
-      "unzip"
-      "wireguard-tools"
-      "xdg-utils"  # for xdg-open
-      # "yarn"
-      "zsh"
-    ];
-
-    desktopConsoleUtils = declPackageSet [
-      "gh"  # MS GitHub cli
-      "nix-index"
-      "nixpkgs-review"
-      "sane-scripts.dev"
-      "sequoia"
-    ];
-
-    consoleMediaUtils = declPackageSet [
-      "ffmpeg"
-      "imagemagick"
-      "sox"
-      "yt-dlp"
-    ];
-
-    tuiApps = declPackageSet [
-      "aerc"  # email client
-      "msmtp"  # sendmail
-      "offlineimap"  # email mailbox sync
-      "sfeed"  # RSS fetcher
-      "visidata"  # TUI spreadsheet viewer/editor
-      "w3m"  # web browser
-    ];
-
-    iphoneUtils = declPackageSet [
-      "ifuse"
-      "ipfs"
-      "libimobiledevice"
-      "sane-scripts.sync-from-iphone"
-    ];
-
-    devPkgs = declPackageSet [
-      "cargo"
-      "clang"
-      "lua"
-      "nodejs"
-      "patchelf"
-      "rustc"
-      "tree-sitter"
-    ];
-
-
-    # INDIVIDUAL PACKAGE DEFINITIONS
-
-    cargo.persist.byStore.plaintext = [ ".cargo" ];
-
-    # creds, but also 200 MB of node modules, etc
-    discord.persist.byStore.private = [ ".config/discord" ];
-
-    # `emote` will show a first-run dialog based on what's in this directory.
-    # mostly, it just keeps a LRU of previously-used emotes to optimize display order.
-    # TODO: package [smile](https://github.com/mijorus/smile) for probably a better mobile experience.
-    emote.persist.byStore.plaintext = [ ".local/share/Emote" ];
-
-    fluffychat-moby.persist.byStore.plaintext = [ ".local/share/chat.fluffy.fluffychat" ];
-
-    font-manager.package = pkgs.font-manager.override {
-      # build without the "Google Fonts" integration feature, to save closure / avoid webkitgtk_4_0
-      withWebkit = false;
-    };
-
-    # MS GitHub stores auth token in .config
-    # TODO: we can populate gh's stuff statically; it even lets us use the same oauth across machines
-    gh.persist.byStore.private = [ ".config/gh" ];
-
-    "gnome.gnome-maps".persist.byStore.plaintext = [ ".cache/shumate" ];
-    "gnome.gnome-maps".persist.byStore.private = [ ".local/share/maps-places.json" ];
-
-    # actual monero blockchain (not wallet/etc; safe to delete, just slow to regenerate)
-    # XXX: is it really safe to persist this? it doesn't have info that could de-anonymize if captured?
-    monero-gui.persist.byStore.plaintext = [ ".bitmonero" ];
-
-    mumble.persist.byStore.private = [ ".local/share/Mumble" ];
-
-    # settings (electron app)
-    obsidian.persist.byStore.plaintext = [ ".config/obsidian" ];
-
-    python3-repl.package = pkgs.python3.withPackages (ps: with ps; [
-      requests
-    ]);
-
-    # creds, media
-    signal-desktop.persist.byStore.private = [ ".config/Signal" ];
-
-    # printer/filament settings
-    slic3r.persist.byStore.plaintext = [ ".Slic3r" ];
-
-    tdesktop.persist.byStore.private = [ ".local/share/TelegramDesktop" ];
-
-    tokodon.persist.byStore.private = [ ".cache/KDE/tokodon" ];
-
-    whalebird.persist.byStore.private = [ ".config/Whalebird" ];
-
-    yarn.persist.byStore.plaintext = [ ".cache/yarn" ];
-
-    # zcash coins. safe to delete, just slow to regenerate (10-60 minutes)
-    zecwallet-lite.persist.byStore.private = [ ".zcash" ];
-  };
-
-  programs.feedbackd = lib.mkIf config.sane.programs.feedbackd.enabled {
-    enable = true;
-  };
-}
--- a/hosts/common/programs/bemenu.nix
+++ b/hosts/common/programs/bemenu.nix
@@ -1,103 +0,0 @@
-{ lib, pkgs, ... }:
-# notable bemenu options:
-#   - see `bemenu --help` for all
-#   -P, --prefix          text to show before highlighted item.
-#   --scrollbar           display scrollbar. (none (default), always, autohide)
-#   -H, --line-height     defines the height to make each menu line (0 = default height). (wx)
-#   -M, --margin          defines the empty space on either side of the menu. (wx)
-#   -W, --width-factor    defines the relative width factor of the menu (from 0 to 1). (wx)
-#   -B, --border          defines the width of the border in pixels around the menu. (wx)
-#   -R  --border-radius   defines the radius of the border around the menu (0 = no curved borders).
-#   --ch                  defines the height of the cursor (0 = scales with line height). (wx)
-#   --cw                  defines the width of the cursor. (wx)
-#   --hp                  defines the horizontal padding for the entries in single line mode. (wx)
-#   --fn                  defines the font to be used ('name [size]'). (wx)
-#   --tb                  defines the title background color. (wx)
-#   --tf                  defines the title foreground color. (wx)
-#   --fb                  defines the filter background color. (wx)
-#   --ff                  defines the filter foreground color. (wx)
-#   --nb                  defines the normal background color. (wx)
-#   --nf                  defines the normal foreground color. (wx)
-#   --hb                  defines the highlighted background color. (wx)
-#   --hf                  defines the highlighted foreground color. (wx)
-#   --fbb                 defines the feedback background color. (wx)
-#   --fbf                 defines the feedback foreground color. (wx)
-#   --sb                  defines the selected background color. (wx)
-#   --sf                  defines the selected foreground color. (wx)
-#   --ab                  defines the alternating background color. (wx)
-#   --af                  defines the alternating foreground color. (wx)
-#   --scb                 defines the scrollbar background color. (wx)
-#   --scf                 defines the scrollbar foreground color. (wx)
-#   --bdr                 defines the border color. (wx)
-#
-# colors are specified as `#RRGGBB`
-# defaults:
-# --ab "#222222"
-# --af "#bbbbbb"
-# --bdr "#005577"
-# --border 3
-# --cb "#222222"
-# --center
-# --cf "#bbbbbb"
-# --fb "#222222"
-# --fbb "#eeeeee"
-# --fbf "#222222"
-# --ff "#bbbbbb"
-# --fixed-height
-# --fn 'Sxmo 14'
-# --hb "#005577"
-# --hf "#eeeeee"
-# --line-height 20
-# --list 16
-# --margin 40
-# --nb "#222222"
-# --nf "#bbbbbb"
-# --no-overlap
-# --no-spacing
-# --sb "#323232"
-# --scb "#005577"
-# --scf "#eeeeee"
-# --scrollbar autohide
-# --tb "#005577"
-# --tf "#eeeeee"
-# --wrap
-let
-  bg = "#1d1721";       # slight purple
-  fg0 = "#d8d8d8";      # inactive text (light grey)
-  fg1 = "#ffffff";      # active text   (white)
-  accent0 = "#1f5e54";  # darker but saturated teal
-  accent1 = "#418379";  # teal (matches nixos-bg)
-  accent2 = "#5b938a";  # brighter but muted teal
-  bemenuArgs = [
-    "--wrap --scrollbar autohide --fixed-height"
-    "--center --margin 45"
-    "--no-spacing"
-    # XXX: font size doesn't seem to take effect (would prefer larger)
-    "--fn 'monospace 14' --line-height 22 --border 3"
-    "--bdr '${accent0}'"                     # border
-    "--scf '${accent2}' --scb '${accent0}'"  # scrollbar
-    "--tb '${accent0}' --tf '${fg0}'"        # title
-    "--fb '${accent0}' --ff '${fg1}'"        # filter (i.e. text that's been entered)
-    "--hb '${accent1}' --hf '${fg1}'"        # selected item
-    "--nb '${bg}' --nf '${fg0}'"             # normal lines (even)
-    "--ab '${bg}' --af '${fg0}'"             # alternated lines (odd)
-    "--cf '${accent0}' --cb '${accent0}'"    # cursor (not very useful)
-  ];
-  bemenuOpts = lib.concatStringsSep " " bemenuArgs;
-in
-{
-  sane.programs.bemenu = {
-    package = pkgs.bemenu.overrideAttrs (upstream: {
-      nativeBuildInputs = (upstream.nativeBuildInputs or []) ++ [
-        pkgs.makeWrapper
-      ];
-      # can alternatively be specified as CLI flags
-      postInstall = (upstream.postInstall or "") + ''
-        wrapProgram $out/bin/bemenu \
-          --set BEMENU_OPTS "${bemenuOpts}"
-        wrapProgram $out/bin/bemenu-run \
-          --set BEMENU_OPTS "${bemenuOpts}"
-      '';
-    });
-  };
-}
--- a/hosts/common/programs/brave.nix
+++ b/hosts/common/programs/brave.nix
@@ -1,9 +0,0 @@
-{ ... }:
-{
-  sane.programs.brave = {
-    persist.byStore.cryptClearOnBoot = [
-      ".cache/BraveSoftware"
-      ".config/BraveSoftware"
-    ];
-  };
-}
--- a/hosts/common/programs/calls.nix
+++ b/hosts/common/programs/calls.nix
@@ -1,61 +0,0 @@
-# GNOME calls
-# - <https://gitlab.gnome.org/GNOME/calls>
-# - both a dialer and a call handler.
-# - uses callaudiod dbus package.
-#
-# initial JMP.chat configuration:
-# - message @cheogram.com "reset sip account"  (this is not destructive, despite the name)
-# - the bot will reply with auto-generated username/password plus a SIP server endpoint.
-#   just copy those into gnome-calls' GUI configurator
-# - now gnome-calls can do outbound calls. inbound calls requires more chatting with the help bot
-#
-# my setup here is still very WIP.
-# open questions:
-# - can i receive calls even with GUI closed?
-#   - e.g. activated by callaudiod?
-#   - looks like `gnome-calls --daemon` does that?
-{ config, lib, ... }:
-let
-  cfg = config.sane.programs.calls;
-in
-{
-  sane.programs.calls = {
-    configOption = with lib; mkOption {
-      default = {};
-      type = types.submodule {
-        options.autostart = mkOption {
-          type = types.bool;
-          default = false;
-        };
-      };
-    };
-
-    persist.byStore.private = [
-      # ".cache/folks"      # contact avatars?
-      # ".config/calls"
-      ".local/share/calls"  # call "records"
-      # .local/share/folks  # contacts?
-    ];
-    secrets.".config/calls/sip-account.cfg" = ../../../secrets/common/gnome_calls_sip-account.cfg.bin;
-    suggestedPrograms = [
-      "feedbackd"  # needs `phone-incoming-call`, in particular
-    ];
-
-    services.gnome-calls = {
-      # TODO: prevent gnome-calls from daemonizing when started manually
-      description = "gnome-calls daemon to monitor incoming SIP calls";
-      wantedBy = lib.mkIf cfg.config.autostart [ "default.target" ];
-      serviceConfig = {
-        # add --verbose for more debugging
-        ExecStart = "${cfg.package}/bin/gnome-calls --daemon";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "10s";
-      };
-      environment.G_MESSAGES_DEBUG = "all";
-    };
-  };
-  programs.calls = lib.mkIf cfg.enabled {
-    enable = true;
-  };
-}
--- a/hosts/common/programs/cantata.nix
+++ b/hosts/common/programs/cantata.nix
@@ -1,36 +0,0 @@
-# cantata is a mpd frontend.
-# before launching it, run `mopidy` in some tab
-# TODO: auto-launch mopidy when cantata launches?
-{ ... }:
-{
-  sane.programs.cantata = {
-    persist.byStore.plaintext = [
-      ".cache/cantata"  # album art
-      ".local/share/cantata/library"  # library index (?)
-    ];
-    fs.".config/cantata/cantata.conf".symlink.text = ''
-      [General]
-      fetchCovers=true
-      storeCoversInMpdDir=false
-      version=2.5.0
-
-      [Connection]
-      allowLocalStreaming=true
-      applyReplayGain=true
-      autoUpdate=false
-      dir=~/Music
-      host=localhost
-      partition=
-      passwd=
-      port=6600
-      replayGain=off
-      streamUrl=
-
-      [LibraryPage]
-      artist\gridZoom=100
-      artist\searchActive=false
-      artist\viewMode=detailedtree
-    '';
-    suggestedPrograms = [ "mopidy" ];
-  };
-}
--- a/hosts/common/programs/chatty.nix
+++ b/hosts/common/programs/chatty.nix
@@ -1,46 +0,0 @@
-{ pkgs, ... }:
-let
-  chattyNoOauth = pkgs.chatty.override {
-    # the OAuth feature (presumably used for web-based logins) pulls a full webkitgtk.
-    # especially when using the gtk3 version of evolution-data-server, it's an ancient webkitgtk_4_1.
-    # disable OAuth for a faster build & smaller closure
-    evolution-data-server = pkgs.evolution-data-server.override {
-      enableOAuth2 = false;
-      gnome-online-accounts = pkgs.gnome-online-accounts.override {
-        # disables the upstream "goabackend" feature -- presumably "Gnome Online Accounts Backend"
-        # frees us from webkit_4_1, in turn.
-        enableBackend = false;
-        gvfs = pkgs.gvfs.override {
-          # saves 20 minutes of build time, for unused feature
-          samba = null;
-        };
-      };
-    };
-  };
-  chatty-latest = pkgs.chatty-latest.override {
-    evolution-data-server-gtk4 = pkgs.evolution-data-server-gtk4.override {
-      gnome-online-accounts = pkgs.gnome-online-accounts.override {
-        # disables the upstream "goabackend" feature -- presumably "Gnome Online Accounts Backend"
-        # frees us from webkit_4_1, in turn.
-        enableBackend = false;
-        gvfs = pkgs.gvfs.override {
-          # saves 20 minutes of build time and cross issues, for unused feature
-          samba = null;
-        };
-      };
-    };
-  };
-in
-{
-  sane.programs.chatty = {
-    # package = chattyNoOauth;
-    package = chatty-latest;
-    suggestedPrograms = [ "gnome-keyring" ];
-    persist.byStore.private = [
-      ".local/share/chatty"  # matrix avatars and files
-      # not just XMPP; without this Chatty will regenerate its device-id every boot.
-      # .purple/ contains XMPP *and* Matrix auth, logs, avatar cache, and a bit more
-      ".purple"
-    ];
-  };
-}
--- a/hosts/common/programs/conky/battery_estimate
+++ b/hosts/common/programs/conky/battery_estimate
@@ -1,32 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash
-
-full=$(cat /sys/class/power_supply/axp20x-battery/charge_full_design)
-rate=$(cat /sys/class/power_supply/axp20x-battery/current_now)
-perc=$(cat /sys/class/power_supply/axp20x-battery/capacity)
-perc_left=$((100 - $perc))
-# these icons come from sxmo; they only render in nerdfonts
-bat_dis="󱊢"
-bat_chg="󱊥"
-
-fmt_minutes() {
-  # args: <battery symbol> <text if ludicrous estimate> <estimated minutes to full/empty>
-  if [[ $3 -gt 1440 ]]; then
-    printf "%s %s" "$1" "$2"  # more than 1d
-  else
-    hr=$(($3 / 60))
-    hr_in_min=$(($hr * 60))
-    min=$(($3 - $hr_in_min))
-    printf "%s %dh%02dm" "$1" "$hr" "$min"
-  fi
-}
-
-if [[ $rate -lt 0 ]]; then
-  # discharging
-  fmt_minutes "$bat_dis" '∞' "$(($full * 60 * $perc / (-100 * $rate)))"
-elif [[ $rate -gt 0 ]]; then
-  # charging
-  fmt_minutes "$bat_chg" '100%' "$(($full * 60 * $perc_left / (100 * $rate)))"
-else
-  echo "$bat_dis $perc%"
-fi
--- a/hosts/common/programs/conky/conky.conf
+++ b/hosts/common/programs/conky/conky.conf
@@ -1,50 +0,0 @@
-- docs: <https://conky.cc/variables>
-- color names are X11 colors: <https://en.wikipedia.org/wiki/X11_color_names#Color_name_chart>
-- - can also use #rrggbb syntax
-- example configs: <https://forum.manjaro.org/t/conky-showcase-2022/97123>
-- example configs: <https://www.reddit.com/r/Conkyporn/>
-
-conky.config = {
-    out_to_wayland = true,
-    update_interval = 10,
-
-    alignment = 'middle_middle',
-    own_window_type = 'desktop',
-    -- own_window_argb_value: opacity of the background (0-255)
-    own_window_argb_value = 0,
-    -- own_window_argb_value = 92,
-    -- own_window_colour = '#beebe5',  -- beebe5 matches nixos flake bg color
-
-    -- "border" pads the entire conky window
-    -- this can be used to control the extent of the own_window background
-    border_inner_margin = 8,
-    -- optionally, actually draw borders
-    -- draw_borders = true,
-
-    -- shades are drop-shadows, outline is the centered version. both apply to text only
-    draw_shades = true,
-    draw_outline = false,
-    default_shade_color = '#beebe5',
-    default_outline_color = '#beebe5',
-
-    font = 'sans-serif:size=8',
-    use_xft = true,
-
-    default_color = '#ffffff',
-    color1 = '000000',
-    color2 = '404040',
-}
-
-- texeci <interval_sec> <cmd>: run the command periodically, _in a separate thread_ so as not to block rendering
-conky.text = [[
-${color1}${shadecolor 707070}${font sans-serif:size=50:style=Bold}${alignc}${exec date +"%H:%M"}${font}
-${color2}${shadecolor a4d7d0}${font sans-serif:size=20}${alignc}${exec date +"%a %d %b"}${font}
-
-
-${color1}${shadecolor}${font sans-serif:size=22:style=Bold}${alignc}${exec @bat@ }${font}
-${color1}${shadecolor}${font sans-serif:size=20:style=Bold}${alignc}${texeci 600 @weather@ }${font}
-
-
-${color2}${shadecolor a4d7d0}${font sans-serif:size=16}${alignc}⇅ ${downspeedf wlan0}K/s${font}
-${font sans-serif:size=16}${alignc}☵ $memperc%  $cpu%${font}
-]]
--- a/hosts/common/programs/conky/default.nix
+++ b/hosts/common/programs/conky/default.nix
@@ -1,34 +0,0 @@
-{ config, pkgs, ... }:
-{
-  sane.programs.conky = {
-    fs.".config/conky/conky.conf".symlink.target =
-      let
-        battery_estimate = pkgs.static-nix-shell.mkBash {
-          pname = "battery_estimate";
-          src = ./.;
-        };
-      in pkgs.substituteAll {
-        src = ./conky.conf;
-        bat = "${battery_estimate}/bin/battery_estimate";
-        weather = "timeout 20 ${pkgs.sane-weather}/bin/sane-weather";
-      };
-
-    services.conky = {
-      description = "conky dynamic desktop background";
-      wantedBy = [ "default.target" ];
-      # XXX: should be part of graphical-session.target, but whatever mix of greetd/sway
-      # i'm using means that target's never reached...
-      # wantedBy = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];
-
-      serviceConfig.ExecStart = "${config.sane.programs.conky.package}/bin/conky";
-      serviceConfig.Type = "simple";
-      serviceConfig.Restart = "on-failure";
-      serviceConfig.RestartSec = "10s";
-      # serviceConfig.Slice = "session.slice";
-
-      # don't start conky until after sway
-      preStart = ''test -n "$SWAYSOCK"'';
-    };
-  };
-}
--- a/hosts/common/programs/cozy.nix
+++ b/hosts/common/programs/cozy.nix
@@ -1,11 +0,0 @@
-{ ... }:
-
-{
-  sane.programs.cozy = {
-    # cozy uses a sqlite db for its config and exposes no CLI options other than --help and --debug
-    persist.byStore.plaintext = [
-      ".local/share/cozy"  # sqlite db (config & index?)
-      ".cache/cozy"  # offline cache
-    ];
-  };
-}
--- a/hosts/common/programs/default.nix
+++ b/hosts/common/programs/default.nix
@@ -1,79 +0,0 @@
-{ pkgs, ... }:
-
-{
-  imports = [
-    ./aerc.nix
-    ./alacritty.nix
-    ./assorted.nix
-    ./bemenu.nix
-    ./brave.nix
-    ./calls.nix
-    ./cantata.nix
-    ./chatty.nix
-    ./conky
-    ./cozy.nix
-    ./dino.nix
-    ./element-desktop.nix
-    ./epiphany.nix
-    ./evince.nix
-    ./feedbackd.nix
-    ./firefox.nix
-    ./flare-signal.nix
-    ./fontconfig.nix
-    ./fractal.nix
-    ./fwupd.nix
-    ./g4music.nix
-    ./gajim.nix
-    ./geary.nix
-    ./git.nix
-    ./gnome-feeds.nix
-    ./gnome-keyring.nix
-    ./gnome-weather.nix
-    ./gpodder.nix
-    ./gthumb.nix
-    ./helix.nix
-    ./imagemagick.nix
-    ./jellyfin-media-player.nix
-    ./komikku.nix
-    ./koreader
-    ./libreoffice.nix
-    ./lemoa.nix
-    ./mako.nix
-    ./megapixels.nix
-    ./mepo.nix
-    ./mopidy.nix
-    ./mpv.nix
-    ./msmtp.nix
-    ./neovim.nix
-    ./newsflash.nix
-    ./nheko.nix
-    ./nix-index.nix
-    ./ntfy-sh.nix
-    ./obsidian.nix
-    ./offlineimap.nix
-    ./playerctl.nix
-    ./rhythmbox.nix
-    ./ripgrep.nix
-    ./sfeed.nix
-    ./splatmoji.nix
-    ./spotify.nix
-    ./steam.nix
-    ./stepmania.nix
-    ./sublime-music.nix
-    ./swaynotificationcenter.nix
-    ./tangram.nix
-    ./tor-browser-bundle-bin.nix
-    ./tuba.nix
-    ./vlc.nix
-    ./wireshark.nix
-    ./xarchiver.nix
-    ./zeal.nix
-    ./zsh
-  ];
-
-  config = {
-    # XXX: this might not be necessary. try removing this and cacert.unbundled (servo)?
-    environment.etc."ssl/certs".source = "${pkgs.cacert.unbundled}/etc/ssl/certs/*";
-
-  };
-}
--- a/hosts/common/programs/dino.nix
+++ b/hosts/common/programs/dino.nix
@@ -1,71 +0,0 @@
-# usage:
-# - start a DM with a rando via
-#   - '+' -> 'start conversation'
-# - add a user to your roster via
-#   - '+' -> 'start conversation' -> '+'  (opens the "add contact" dialog)
-#   - this triggers a popup on the remote side asking them for confirmation
-#   - after the remote's confirmation there will be a local popup for you to allow them to add you to their roster
-# - to make a call:
-#   - ensure the other party is in your roster
-#   - open a DM with the party
-#   - click the phone icon at top (only visible if other party is in your roster)
-#
-# dino can be autostarted on login -- useful to ensure that i always receive calls and notifications --
-# but at present it has no "start in tray" type of option: it must render a window.
-#
-# outstanding bugs:
-# - mic is sometimes disabled at call start despite presenting as enabled
-#   - fix is to toggle it off -> on in the Dino UI
-# - default mic gain is WAY TOO MUCH (heavily distorted)
-# - TODO: dino should have more optimal niceness/priority to ensure it can process its buffers
-#   - possibly this is solved by enabling RealtimeKit (rtkit)
-# - TODO: see if Dino calls work better with `echo full > /sys/kernel/debug/sched/preempt`
-#
-# probably fixed:
-# - once per 1-2 minutes dino will temporarily drop mic input:
-#   - `rtp-WRNING: plugin.vala:148: Warning in pipeline: Can't record audio fast enough
-#   - this was *partially* fixed by bumping the pipewire mic buffer to 2048 samples (from ~512)
-#   - this was further fixed by setting PULSE_LATENCY_MSEC=20.
-#   - possibly Dino should be updated internally: `info.rate / 100` -> `info.rate / 50`.
-#     - i think that affects the batching for echo cancellation, adaptive gain control, etc.
-#
-{ config, lib, ... }:
-let
-  cfg = config.sane.programs.dino;
-in
-{
-  sane.programs.dino = {
-    configOption = with lib; mkOption {
-      default = {};
-      type = types.submodule {
-        options.autostart = mkOption {
-          type = types.bool;
-          default = false;
-        };
-      };
-    };
-
-    persist.byStore.private = [ ".local/share/dino" ];
-
-    services.dino = {
-      description = "auto-start and maintain dino XMPP connection";
-      wantedBy = lib.mkIf cfg.config.autostart [ "default.target" ];
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/dino";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
-
-      # audio buffering; see: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/FAQ#pipewire-buffering-explained>
-      # dino defaults to 10ms mic buffer, which causes underruns, which Dino handles *very* poorly
-      # as in, the other end of the call will just not receive sound from us for a couple seconds.
-      # pipewire uses power-of-two buffering for the mic itself. that would put us at 21.33 ms, but this env var supports only whole numbers (21ms ends up not power-of-two).
-      # also, Dino's likely still doing things in 10ms batches internally anyway.
-      environment.PULSE_LATENCY_MSEC = "20";
-
-      # note that debug logging during calls produces so much journal spam that it pegs the CPU and causes dropped audio
-      # environment.G_MESSAGES_DEBUG = "all";
-    };
-  };
-}
--- a/hosts/common/programs/element-desktop.nix
+++ b/hosts/common/programs/element-desktop.nix
@@ -1,15 +0,0 @@
-# debugging tips:
-# - if element opens but does not render:
-#   - `element-desktop --disable-gpu --in-process-gpu`
-#     - <https://github.com/vector-im/element-desktop/issues/1029#issuecomment-1632688224>
-#   - `rm -rf ~/.config/Element/GPUCache`
-#     - <https://github.com/NixOS/nixpkgs/issues/244486>
-{ ... }:
-{
-  sane.programs.element-desktop = {
-    # creds/session keys, etc
-    persist.byStore.private = [ ".config/Element" ];
-
-    suggestedPrograms = [ "gnome-keyring" ];
-  };
-}
--- a/hosts/common/programs/epiphany.nix
+++ b/hosts/common/programs/epiphany.nix
@@ -1,48 +0,0 @@
-# epiphany web browser
-# - GTK4/webkitgtk
-#
-# usability notes:
-# - touch-based scroll works well (for moby)
-# - URL bar constantly resets cursor to the start of the line as i type
-#   - maybe due to the URLbar suggestions getting in the way
-{ pkgs, ... }:
-{
-  sane.programs.epiphany = {
-    # XXX(2023/07/08): running on moby without `WEBKIT_DISABLE_SANDBOX...` fails, with:
-    # - `bwrap: Can't make symlink at /var/run: File exists`
-    # this could be due to:
-    # - epiphany is somewhere following a symlink into /var/run instead of /run
-    #   - (nothing in `env` or in this repo touches /var/run)
-    # - no xdg-desktop-portal is installed  (unlikely)
-    #
-    # a few other users have hit this, in different contexts:
-    # - <https://gitlab.gnome.org/GNOME/gnome-builder/-/issues/1164>
-    # - <https://github.com/flatpak/flatpak/issues/3477>
-    # - <https://github.com/NixOS/nixpkgs/issues/197085>
-    #
-    # TODO: consider `WEBKIT_USE_SINGLE_WEB_PROCESS=1` for better perf
-    # - this runs all tabs in 1 process. which is fine, if i'm not a heavy multi-tabber
-    package = pkgs.epiphany.overrideAttrs (upstream: {
-      preFixup = ''
-        gappsWrapperArgs+=(
-          --set WEBKIT_DISABLE_SANDBOX_THIS_IS_DANGEROUS "1"
-        );
-      '' + (upstream.preFixup or "");
-    });
-    persist.byStore.private = [
-      ".cache/epiphany"
-      ".local/share/epiphany"
-      # also .config/epiphany, but appears empty
-    ];
-    mime.priority = 200;  # default priority is 100: install epiphany only as a fallback
-    mime.associations = let
-      desktop = "org.gnome.Epiphany.desktop";
-    in {
-      "text/html" = desktop;
-      "x-scheme-handler/http" = desktop;
-      "x-scheme-handler/https" = desktop;
-      "x-scheme-handler/about" = desktop;
-      "x-scheme-handler/unknown" = desktop;
-    };
-  };
-}
--- a/hosts/common/programs/evince.nix
+++ b/hosts/common/programs/evince.nix
@@ -1,4 +0,0 @@
-{ ... }:
-{
-  sane.programs.evince.mime.associations."application/pdf" = "org.gnome.Evince.desktop";
-}
--- a/hosts/common/programs/feedbackd.nix
+++ b/hosts/common/programs/feedbackd.nix
@@ -1,114 +0,0 @@
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.sane.programs.feedbackd;
-in
-{
-  sane.programs.feedbackd = {
-    package = pkgs.rmDbusServices pkgs.feedbackd;
-
-    configOption = with lib; mkOption {
-      type = types.submodule {
-        options.proxied = mkOption {
-          type = types.bool;
-          default = false;
-          description = ''
-          whether to use a sound theme in which common application events are muted
-          with the intent that a proxy (notification daemon) with knowledge of this
-          modification will "speak" on behalf of all applications.
-          '';
-        };
-      };
-      default = {};
-    };
-
-    # N.B.: feedbackd will load ~/.config/feedbackd/themes/default.json by default
-    # - but using that would forbid `parent-theme = "default"`
-    # the default theme ships support for these events:
-    # - alarm-clock-elapsed
-    # - battery-caution
-    # - bell-terminal
-    # - button-pressed
-    # - button-released
-    # - camera-focus
-    # - camera-shutter
-    # - message-missed-email
-    # - message-missed-instant
-    # - message-missed-notification
-    # - message-missed-sms
-    # - message-new-email
-    # - message-new-instant
-    # - message-new-sms
-    # - message-sent-instant
-    # - phone-failure
-    # - phone-hangup
-    # - phone-incoming-call
-    # - phone-missed-call
-    # - phone-outgoing-busy
-    # - screen-capture
-    # - theme-demo
-    # - timeout-completed
-    # - window-close
-    fs.".config/feedbackd/themes/proxied.json".symlink.text = builtins.toJSON {
-      name = "proxied";
-      parent-theme = "default";
-      profiles = [
-        {
-          name = "full";
-          feedbacks = [
-            # forcibly disable normal events which we'd prefer for the notification daemon (e.g. swaync) to handle
-            {
-              event-name = "message-new-instant";
-              type = "Dummy";
-            }
-            {
-              event-name = "proxied-message-new-instant";
-              type = "Sound";
-              effect = "message-new-instant";
-            }
-            # re-define sounds from the default theme which we'd like to pass through w/o proxying.
-            # i guess this means i'm not inheriting the default theme :|
-            {
-              event-name = "phone-incoming-call";
-              type = "Sound";
-              effect = "phone-incoming-call";
-            }
-            {
-              event-name = "alarm-clock-elapsed";
-              type = "Sound";
-              effect = "alarm-clock-elapsed";
-            }
-            {
-              event-name = "timeout-completed";
-              type = "Sound";
-              effect = "complete";
-            }
-          ];
-        }
-      ];
-    };
-
-    services.feedbackd = {
-      description = "feedbackd audio/vibration/led controller";
-      wantedBy = [ "default.target" ];
-      serviceConfig = {
-        ExecStart = "${cfg.package}/libexec/feedbackd";
-        Type = "simple";
-        Restart = "on-failure";
-        RestartSec = "10s";
-      };
-      environment = {
-        G_MESSAGES_DEBUG = "all";
-      } // (lib.optionalAttrs cfg.config.proxied {
-        FEEDBACK_THEME = "/home/colin/.config/feedbackd/themes/proxied.json";
-      });
-    };
-  };
-
-  services.udev.packages = lib.mkIf cfg.enabled [
-    # ships udev rules for `feedbackd` group to be able to control vibrator and LEDs
-    cfg.package
-  ];
-  users.groups = lib.mkIf cfg.enabled {
-    feedbackd = {};
-  };
-}
--- a/hosts/common/programs/firefox.nix
+++ b/hosts/common/programs/firefox.nix
@@ -1,268 +0,0 @@
-# common settings to toggle (at runtime, in about:config):
-#   > security.ssl.require_safe_negotiation
-
-# librewolf is a forked firefox which patches firefox to allow more things
-# (like default search engines) to be configurable at runtime.
-# many of the settings below won't have effect without those patches.
-# see: https://gitlab.com/librewolf-community/settings/-/blob/master/distribution/policies.json
-
-{ config, lib, pkgs, ...}:
-with lib;
-let
-  cfg = config.sane.programs.firefox.config;
-  mobile-prefs = lib.optionals false pkgs.librewolf-pmos-mobile.extraPrefsFiles;
-  # allow easy switching between firefox and librewolf with `defaultSettings`, below
-  librewolfSettings = {
-    browser = pkgs.librewolf-unwrapped;
-    extraPrefsFiles = pkgs.librewolf-unwrapped.extraPrefsFiles ++ mobile-prefs;
-    libName = "librewolf";
-    dotDir = ".librewolf";
-    cacheDir = ".cache/librewolf";
-    desktop = "librewolf.desktop";
-  };
-  firefoxSettings = {
-    browser = pkgs.firefox-esr-unwrapped;
-    extraPrefsFiles = mobile-prefs;
-    libName = "firefox";
-    dotDir = ".mozilla/firefox";
-    cacheDir = ".cache/mozilla";
-    desktop = "firefox.desktop";
-  };
-  # defaultSettings = firefoxSettings;
-  defaultSettings = librewolfSettings;
-
-  addon = name: extid: hash: pkgs.fetchFirefoxAddon {
-    inherit name hash;
-    url = "https://addons.mozilla.org/firefox/downloads/latest/${name}/latest.xpi";
-    # extid can be found by unar'ing the above xpi, and copying browser_specific_settings.gecko.id field
-    fixedExtid = extid;
-  };
-  localAddon = pkg: pkgs.fetchFirefoxAddon {
-    inherit (pkg) name;
-    src = "${pkg}/share/mozilla/extensions/\\{ec8030f7-c20a-464f-9b0e-13a3a9e97384\\}/${pkg.extid}.xpi";
-    fixedExtid = pkg.extid;
-  };
-
-  package = pkgs.wrapFirefox cfg.browser.browser {
-    # inherit the default librewolf.cfg
-    # it can be further customized via ~/.librewolf/librewolf.overrides.cfg
-    inherit (cfg.browser) extraPrefsFiles libName;
-
-    extraNativeMessagingHosts = optional cfg.addons.browserpass-extension.enable pkgs.browserpass;
-    # extraNativeMessagingHosts = [ pkgs.gopass-native-messaging-host ];
-
-    nixExtensions = concatMap (ext: optional ext.enable ext.package) (attrValues cfg.addons);
-
-    extraPolicies = {
-      FirefoxHome = {
-        Search = true;
-        Pocket = false;
-        Snippets = false;
-        TopSites = false;
-        Highlights = false;
-      };
-      NoDefaultBookmarks = true;
-      OfferToSaveLogins = false;
-      OfferToSaveLoginsDefault = false;
-      PasswordManagerEnabled = false;
-      SearchEngines = {
-        Default = "DuckDuckGo";
-      };
-      UserMessaging = {
-        ExtensionRecommendations = false;
-        FeatureRecommendations = false;
-        SkipOnboarding = true;
-        UrlbarInterventions = false;
-        WhatsNew = false;
-      };
-
-      # these were taken from Librewolf
-      AppUpdateURL = "https://localhost";
-      DisableAppUpdate = true;
-      OverrideFirstRunPage = "";
-      OverridePostUpdatePage = "";
-      DisableSystemAddonUpdate = true;
-      DisableFirefoxStudies = true;
-      DisableTelemetry = true;
-      DisableFeedbackCommands = true;
-      DisablePocket = true;
-      DisableSetDesktopBackground = false;
-
-      # remove many default search providers
-      # XXX this seems to prevent the `nixExtensions` from taking effect
-      # Extensions.Uninstall = [
-      #   "google@search.mozilla.org"
-      #   "bing@search.mozilla.org"
-      #   "amazondotcom@search.mozilla.org"
-      #   "ebay@search.mozilla.org"
-      #   "twitter@search.mozilla.org"
-      # ];
-      # XXX doesn't seem to have any effect...
-      # docs: https://github.com/mozilla/policy-templates#homepage
-      # Homepage = {
-      #   HomepageURL = "https://uninsane.org/";
-      #   StartPage = "homepage";
-      # };
-      # NewTabPage = true;
-    };
-    # extraPrefs = ...
-  };
-
-  addonOpts = types.submodule {
-    options = {
-      package = mkOption {
-        type = types.package;
-      };
-      enable = mkOption {
-        type = types.bool;
-      };
-    };
-  };
-
-  configOpts = {
-    options = {
-      browser = mkOption {
-        default = defaultSettings;
-        type = types.anything;
-      };
-      persistData = mkOption {
-        description = "optional store name to which persist browsing data (like history)";
-        type = types.nullOr types.str;
-        default = null;
-      };
-      persistCache = mkOption {
-        description = "optional store name to which persist browser cache";
-        type = types.nullOr types.str;
-        default = "cryptClearOnBoot";
-      };
-      addons = mkOption {
-        type = types.attrsOf addonOpts;
-        default = {};
-      };
-    };
-  };
-in
-{
-  config = mkMerge [
-    ({
-      sane.programs.firefox.configOption = mkOption {
-        type = types.submodule configOpts;
-        default = {};
-      };
-      sane.programs.firefox.config.addons = {
-        browserpass-extension = {
-          package = pkgs.firefox-extensions.browserpass-extension;
-          enable = lib.mkDefault true;
-        };
-        bypass-paywalls-clean = {
-          package = pkgs.firefox-extensions.bypass-paywalls-clean;
-          enable = lib.mkDefault true;
-        };
-        ether-metamask = {
-          package = pkgs.firefox-extensions.ether-metamask;
-          enable = lib.mkDefault false;  # until i can disable the first-run notification
-        };
-        i2p-in-private-browsing = {
-          package = pkgs.firefox-extensions.i2p-in-private-browsing;
-          enable = lib.mkDefault config.services.i2p.enable;
-        };
-        sidebery = {
-          package = pkgs.firefox-extensions.sidebery;
-          enable = lib.mkDefault true;
-        };
-        sponsorblock = {
-          package = pkgs.firefox-extensions.sponsorblock;
-          enable = lib.mkDefault true;
-        };
-        ublacklist = {
-          package = pkgs.firefox-extensions.ublacklist;
-          enable = lib.mkDefault true;
-        };
-        ublock-origin = {
-          package = pkgs.firefox-extensions.ublock-origin;
-          enable = lib.mkDefault true;
-        };
-      };
-    })
-    ({
-      sane.programs.firefox = {
-        inherit package;
-
-        mime.associations = let
-          inherit (cfg.browser) desktop;
-        in {
-          "text/html" = desktop;
-          "x-scheme-handler/http" = desktop;
-          "x-scheme-handler/https" = desktop;
-          "x-scheme-handler/about" = desktop;
-          "x-scheme-handler/unknown" = desktop;
-        };
-
-        # env.BROWSER = "${package}/bin/${cfg.browser.libName}";
-        env.BROWSER = cfg.browser.libName;  # used by misc tools like xdg-email, as fallback
-
-        # uBlock filter list configuration.
-        # specifically, enable the GDPR cookie prompt blocker.
-        # data.toOverwrite.filterLists is additive (i.e. it supplements the default filters)
-        # this configuration method is documented here:
-        # - <https://github.com/gorhill/uBlock/issues/2986#issuecomment-364035002>
-        # the specific attribute path is found via scraping ublock code here:
-        # - <https://github.com/gorhill/uBlock/blob/master/src/js/storage.js>
-        # - <https://github.com/gorhill/uBlock/blob/master/assets/assets.json>
-        fs."${cfg.browser.dotDir}/managed-storage/uBlock0@raymondhill.net.json".symlink.text = ''
-          {
-           "name": "uBlock0@raymondhill.net",
-           "description": "ignored",
-           "type": "storage",
-           "data": {
-              "toOverwrite": "{\"filterLists\": [\"fanboy-cookiemonster\"]}"
-           }
-          }
-        '';
-        # TODO: this is better suited in `extraPrefs` during `wrapFirefox` call
-        fs."${cfg.browser.dotDir}/${cfg.browser.libName}.overrides.cfg".symlink.text = ''
-          // if we can't query the revocation status of a SSL cert because the issuer is offline,
-          // treat it as unrevoked.
-          // see: <https://librewolf.net/docs/faq/#im-getting-sec_error_ocsp_server_error-what-can-i-do>
-          defaultPref("security.OCSP.require", false);
-
-          // scrollbar configuration, see: <https://artemis.sh/2023/10/12/scrollbars.html>
-          // style=4 gives rectangular scrollbars
-          // could also enable "always show scrollbars" in about:preferences -- not sure what the actual pref name for that is
-          defaultPref("widget.non-native-theme.scrollbar.size.override", 50);
-          defaultPref("widget.non-native-theme.scrollbar.style", 4);
-        '';
-        fs."${cfg.browser.dotDir}/default".dir = {};
-        # instruct Firefox to put the profile in a predictable directory (so we can do things like persist just it).
-        # XXX: the directory *must* exist, even if empty; Firefox will not create the directory itself.
-        fs."${cfg.browser.dotDir}/profiles.ini".symlink.text = ''
-          [Profile0]
-          Name=default
-          IsRelative=1
-          Path=default
-          Default=1
-
-          [General]
-          StartWithLastProfile=1
-        '';
-      };
-    })
-    (mkIf config.sane.programs.firefox.enabled {
-      # TODO: move the persistence into the sane.programs API (above)
-      # flush the cache to disk to avoid it taking up too much tmp.
-      sane.user.persist.byPath."${cfg.browser.cacheDir}".store =
-        if (cfg.persistData != null) then
-          cfg.persistData
-        else
-          "cryptClearOnBoot"
-        ;
-
-      sane.user.persist.byPath."${cfg.browser.dotDir}/default".store =
-        if (cfg.persistData != null) then
-          cfg.persistData
-        else
-          "cryptClearOnBoot"
-        ;
-    })
-  ];
-}
--- a/hosts/common/programs/flare-signal.nix
+++ b/hosts/common/programs/flare-signal.nix
@@ -1,47 +0,0 @@
-# Flare is a 3rd-party GTK4 Signal app.
-# UI is effectively a clone of Fractal.
-#
-# compatibility:
-# - desko: works fine. pairs, and exchanges contact list (but not message history) with the paired device. exchanges future messages fine.
-# - moby (cross compiled flare-signal-nixified): nope. it pairs, but can only *receive* messages and never *send* them.
-#   - even `rsync`ing the data and keyrings from desko -> moby, still fails in that same manner.
-#   - console shows error messages. quite possibly an endianness mismatch somewhere
-# - moby (partially-emulated flare-signal): works! pairs and can send/receive messages, same as desko.
-#
-# error signatures (to reset, run `sane-wipe-fractal`):
-# - upon sending a message, the other side receives it, but Signal desktop gets "A message from Colin could not be delivered" and the local CLI shows:
-#   ```
-#   ERROR libsignal_service::websocket] SignalWebSocket: Websocket error: SignalWebSocket: end of application request stream; socket closing
-#   ERROR presage::manager] Error opening envelope: ProtobufDecodeError(DecodeError { description: "invalid tag value: 0", stack: [("Content", "data_message")] }), message will be skipped!
-#   ERROR presage::manager] Error opening envelope: ProtobufDecodeError(DecodeError { description: "invalid tag value: 0", stack: [("Content", "data_message")] }), message will be skipped!
-#   ```
-# - this occurs on moby, desko, `flare-signal` and `flare-signal-nixified`
-# - the Websocket error seems to be unrelated, occurs during normal/good operation
-# - related issues: <https://github.com/whisperfish/presage/issues/152>
-# error when sending from Flare to other Flare device:
-# - ```
-#   ERROR libsignal_protocol::session_cipher] Message from <UUID>.3 failed to decrypt; sender ratchet public key <key> message counter 1
-#       No current session
-#   ERROR presage::manager] Error opening envelope: SignalProtocolError(InvalidKyberPreKeyId), message will be skipped!
-#   ```
-# - but signal iOS will still read it.
-#
-# well, seems to have unpredictable errors particularly when being used on multiple devices.
-# desktop _seems_ more reliable than on mobile, but not confident.
-
-{ pkgs, ... }:
-{
-  sane.programs.flare-signal = {
-    package = pkgs.flare-signal-nixified;
-    # package = pkgs.flare-signal;
-    persist.byStore.private = [
-      # everything: conf, state, files, all opaque
-      ".local/share/flare"
-      # also persists a secret in ~/.local/share/keyrings. reset with:
-      # - `secret-tool search --all --unlock 'xdg:schema' 'de.schmidhuberj.Flare'`
-      # - `secret-tool clear 'xdg:schema' 'de.schmidhuberj.Flare'`
-      # and it persists some dconf settings (e.g. device name). reset with:
-      # - `dconf reset -f /de/schmidhuberj/Flare/`.
-    ];
-  };
-}
--- a/hosts/common/programs/fontconfig.nix
+++ b/hosts/common/programs/fontconfig.nix
@@ -1,68 +0,0 @@
-# to preview fonts:
-# - `font-manager` (gui)
-#   - useful to determine official name; codepoint support
-{ config, lib, pkgs, ... }:
-let
-  # nerdfonts takes popular open fonts and patches them to support a wider range of glyphs, notably emoji.
-  # any nerdfonts font includes icons such as these:
-  # - 󱊥 (battery charging)
-  # - 󰃝 (brightness)
-  # -  (gps / crosshairs)
-  # - 󰎈 (music note)
-  # - 󰍦 (message bubble)
-  # - 󰏲 (phone)
-  # -  (weather/sun-behind-clouds)
-  # used particularly by sxmo utilities, but also a few of my own (e.g. conky)
-  #
-  # nerdfonts is very heavy. each font is 20-900 MiB (2 MiB per "variation")
-  # lots of redundant data inside there, but no deduplication except whatever nix or the fs does implicitly.
-  wantedNerdfonts = [
-    # used explicitly by SXMO
-    # "DejaVuSansMono"  # 25 MiB
-    # good terminal/coding font. grab via nerdfonts for more emoji/unicode support
-    "Hack"  # 26 MiB
-    "Noto"  # 861 MiB
-  ];
-  nerdfontPkgs = builtins.map
-    (f: pkgs.nerdfonts.override { fonts = [ f ]; })
-    wantedNerdfonts;
-in
-{
-  fonts = lib.mkIf config.sane.programs.fontconfig.enabled {
-    fontconfig.enable = true;
-    fontconfig.defaultFonts = {
-      emoji = [
-        "Noto Color Emoji"
-        "Font Awesome 6 Free"
-        "Font Awesome 6 Brands"
-      ];
-      monospace = [
-        "Hack Nerd Font Propo"
-        # "DejaVuSansM Nerd Font Propo"
-        "NotoMono Nerd Font Propo"
-      ];
-      serif = [
-        "NotoSerif Nerd Font"
-        "DejaVu Serif"
-      ];
-      sansSerif = [
-        "NotoSans Nerd Font"
-        "DejaVu Sans"
-      ];
-    };
-    #vvv enables dejavu_fonts, freefont_ttf, gyre-fonts, liberation_ttf, unifont, noto-fonts-emoji
-    enableDefaultPackages = false;
-    packages = with pkgs; [
-      # TODO: reduce this font set.
-      # - probably need only one of dejavu/freefont/liberation
-      dejavu_fonts  # 10 MiB; DejaVu {Sans,Serif,Sans Mono,Math TeX Gyre}; also available as a NerdFonts (Sans Mono only)
-      font-awesome  #  2 MiB; Font Awesome 6 {Free,Brands}
-      freefont_ttf  # 11 MiB; Free{Mono,Sans,Serif}
-      gyre-fonts    #  4 MiB; Tex Gyre *; ttf substitutes for standard PostScript fonts
-      # hack-font     #  1 MiB; Hack; also available as a NerdFonts
-      liberation_ttf # 4 MiB; Liberation {Mono,Sans,Serif}; also available as a NerdFonts
-      noto-fonts-color-emoji  # 10 Mib; Noto Color Emoji
-      unifont       # 16 MiB; Unifont; provides LOTS of unicode coverage
-    ] ++ nerdfontPkgs;
-  };
-}
--- a/hosts/common/programs/fractal.nix
+++ b/hosts/common/programs/fractal.nix
@@ -1,60 +0,0 @@
-# Fractal: GTK4 instant messenger client for the Matrix protocol
-#
-# very susceptible to state corruption during hard power-cycles.
-# if it stalls while launching, especially with a brief message at bottom
-# "unable to open store"
-# then:
-# - remove ~/.local/share/stable/*
-#   - this might give I/O error, in which case remove the corresponding path under
-#     /nix/persist/home/colin/private (which can be found by correlating timestamps/sizes with that in ~/private/.local/share/stable).
-# - reboot (maybe necessary).
-# - now you can send messages, and read messages in unencrypted rooms, but not read messages from encrypted rooms.
-# to fix encrypted message receipt:
-# - start from above (fractal closed, no ~/.local/share/stable/*)
-# - in ~/.local/share/keyrings/Default_keyring.keyring:
-#   - find the entry that says "display-name=Fractal: Matrix credentials for <mxid>"
-#   - remove that entry and all associated entries (i.e. ones with same number but different :attributeN)
-#   - REBOOT. otherwise keyring stuff seems to stay cached in RAM
-#   - login to Fractal. give an hour to sync.
-#   - it'll kick you back to a page asking you to cross-sign. open FluffyChat and do the emoji compare. success!
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.sane.programs.fractal;
-in
-{
-  sane.programs.fractal = {
-    package = pkgs.fractal-nixified;
-    # package = pkgs.fractal-latest;
-    # package = pkgs.fractal-next;
-
-    configOption = with lib; mkOption {
-      default = {};
-      type = types.submodule {
-        options.autostart = mkOption {
-          type = types.bool;
-          default = true;
-        };
-      };
-    };
-
-    persist.byStore.private = [
-      # XXX by default fractal stores its state in ~/.local/share/<build-profile>/<UUID>.
-      ".local/share/hack"    # for debug-like builds
-      ".local/share/stable"  # for normal releases
-    ];
-
-    suggestedPrograms = [ "gnome-keyring" ];
-
-    services.fractal = {
-      description = "auto-start and maintain fractal Matrix connection";
-      wantedBy = lib.mkIf cfg.config.autostart [ "default.target" ];
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/fractal";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
-      # environment.G_MESSAGES_DEBUG = "all";
-    };
-  };
-}
--- a/hosts/common/programs/fwupd.nix
+++ b/hosts/common/programs/fwupd.nix
@@ -1,7 +0,0 @@
-{ config, lib, ... }:
-{
-  services.fwupd = lib.mkIf config.sane.programs.fwupd.enabled {
-    # enables the dbus service, which i think the frontend speaks to.
-    enable = true;
-  };
-}
--- a/hosts/common/programs/g4music.nix
+++ b/hosts/common/programs/g4music.nix
@@ -1,16 +0,0 @@
-# N.B.: requires first-run setup on moby:
-# - UI will render transparent
-# - click the hamburger (top-right: immediately left from close button)
-#   > Preferences
-#     > Background-blur mode: change from "Always" to "Never"
-#
-# the background blur is probably some dconf setting somewhere.
-{ ... }:
-{
-  sane.programs.g4music = {
-    persist.byStore.plaintext = [
-      # index?
-      ".cache/com.github.neithern.g4music"
-    ];
-  };
-}
--- a/Show More
+++ b/Show More