From b56aae444d468fa26a661a106a0c33bd10c1da2c Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Tue, 1 Oct 2024 09:53:38 +0000
Subject: [PATCH] MASSIVELY reduce eval time for cross-compiled hosts (i.e.
 moby)

moby eval time is reduced from ~3m to 17s
---
 ...24-10-01-python-cross-resource-usage.patch | 23 +++++++++++++++++++
 pkgs/additional/nixpkgs/list.nix              |  6 +----
 2 files changed, 24 insertions(+), 5 deletions(-)
 create mode 100644 pkgs/additional/nixpkgs/2024-10-01-python-cross-resource-usage.patch

diff --git a/pkgs/additional/nixpkgs/2024-10-01-python-cross-resource-usage.patch b/pkgs/additional/nixpkgs/2024-10-01-python-cross-resource-usage.patch
new file mode 100644
index 000000000..98c8e1cd4
--- /dev/null
+++ b/pkgs/additional/nixpkgs/2024-10-01-python-cross-resource-usage.patch
@@ -0,0 +1,23 @@
+commit bd996f1383845e255fb7efddd044996fcf45d578 (HEAD -> 2024-09-30-python-cross-fix)
+Author: Colin <colin@uninsane.org>
+Date:   2024-10-01 09:44:35 +0000
+
+    NOT FOR MERGE: reduce resource usage for cross-compiled python
+
+    this breaks `python.override { ... }`
+
+    for context, see: <https://github.com/NixOS/nixpkgs/issues/338231>
+
+diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
+index bb3dba534b79..4e0e2ced6e6b 100644
+--- a/pkgs/development/interpreters/python/cpython/default.nix
++++ b/pkgs/development/interpreters/python/cpython/default.nix
+@@ -132,7 +132,7 @@ let
+     # When we override the interpreter we also need to override the spliced versions of the interpreter
+     # bluez is excluded manually to break an infinite recursion.
+     inputs' = lib.filterAttrs (n: v: n != "bluez" && n != "passthruFun" && ! lib.isDerivation v) inputs;
+-    override = attr: let python = attr.override (inputs' // { self = python; }); in python;
++    override = attr: attr;
+   in passthruFun rec {
+     inherit self sourceVersion packageOverrides;
+     implementation = "cpython";
diff --git a/pkgs/additional/nixpkgs/list.nix b/pkgs/additional/nixpkgs/list.nix
index 316204667..9b0de50d3 100644
--- a/pkgs/additional/nixpkgs/list.nix
+++ b/pkgs/additional/nixpkgs/list.nix
@@ -29,11 +29,7 @@ let
     );
 in
 [
-  # (fetchpatch' {
-  #   title = "pantheon.switchboard-plug-sound: support cross compilation";
-  #   saneCommit = "86f85de8d008710a11b7b3653ec594438374059e";
-  #   hash = "sha256-fGuS46f9qSMRHvWZvTmcirKufIqlXHwwhckeK1RNejE=";
-  # })
+  ./2024-10-01-python-cross-resource-usage.patch
 
   (fetchpatch' {
     title = "nixos/pam: replace apparmor warnings with assertions";