ship abaddon discord client

hosts/common/programs/abaddon.nix

@@ -0,0 +1,20 @@
+# discord gtk3 client
+{ lib, pkgs, ... }:
+{
+  sane.programs.abaddon = {
+    # nixpkgs marks this explicitly as x86_64-only.
+    # but i can build it for aarch64 here.
+    # the only x86_64 runtime dependency is gnum4, via gtkmm (likely unused; build remnant).
+    # TODO: if it works reliably on aarch64, upstream this!
+    package = pkgs.abaddon.overrideAttrs (upstream: {
+      meta = upstream.meta // {
+        platforms = lib.platforms.linux;
+      };
+    });
+
+    persist.byStore.private = [
+      ".cache/abaddon"
+      ".config/abaddon"  # empty?
+    ];
+  };
+}

hosts/common/programs/assorted.nix

@@ -217,11 +217,6 @@ in
 
     # INDIVIDUAL PACKAGE DEFINITIONS
 
-    abaddon.persist.byStore.private = [
-      ".cache/abaddon"
-      ".config/abaddon"  # empty?
-    ];
-
     animatch.persist.byStore.plaintext = [
       # game progress
       ".config/Holy Pangolin/Animatch"

hosts/common/programs/default.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ./abaddon.nix
     ./aerc.nix
     ./alacritty.nix
     ./assorted.nix

hosts/modules/gui/default.nix

@@ -53,6 +53,7 @@ in
   ];
 
   sane.programs.guiBaseApps = declPackageSet [
+    "abaddon"  # discord client
     "alacritty"  # terminal emulator
     "dialect"  # language translation
     "dino"  # XMPP client