fix: asahi-nixos - revert mesa to 25.2.6

Signed-off-by: Ryan Yin <xiaoyin_c@qq.com>

flake.lock

@@ -7,15 +7,16 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1764169039,
+        "lastModified": 1764168798,
-        "narHash": "sha256-9DabwGlLz2mEOV7nw97HP6LLx1xv4RAHhnQSICbW+mE=",
+        "narHash": "sha256-aB2OhrotdYU8w3uQLio5a/IiyAQvzywOKr81oldqxss=",
         "owner": "ezKEa",
         "repo": "aagl-gtk-on-nix",
-        "rev": "c4a5f08a6ff74624ac576525765b06c79d2077e3",
+        "rev": "e272196d003064dfb177ed9cae6a12021b806048",
         "type": "github"
       },
       "original": {
         "owner": "ezKEa",
+        "ref": "release-25.11",
         "repo": "aagl-gtk-on-nix",
         "type": "github"
       }
@@ -778,16 +779,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1763966396,
+        "lastModified": 1764020296,
-        "narHash": "sha256-6eeL1YPcY1MV3DDStIDIdy/zZCDKgHdkCmsrLJFiZf0=",
+        "narHash": "sha256-6zddwDs2n+n01l+1TG6PlyokDdXzu/oBmEejcH5L5+A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5ae3b07d8d6527c42f17c876e404993199144b6a",
+        "rev": "a320ce8e6e2cc6b4397eef214d202a50a4583829",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-unstable",
+        "ref": "nixos-25.11",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -839,6 +840,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-mesa": {
+      "locked": {
+        "lastModified": 1761817761,
+        "narHash": "sha256-qAEhDH77SIUUOUQC6DYYR+LGTAK+OctxBJPpo9rGMwc=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2b1f0ea3ee3952e68b164efa0a1c5e394ef2e781",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2b1f0ea3ee3952e68b164efa0a1c5e394ef2e781",
+        "type": "github"
+      }
+    },
     "nixpkgs-patched": {
       "locked": {
         "lastModified": 1762844143,
@@ -1105,6 +1122,7 @@
         "nixpkgs": "nixpkgs_6",
         "nixpkgs-darwin": "nixpkgs-darwin",
         "nixpkgs-master": "nixpkgs-master",
+        "nixpkgs-mesa": "nixpkgs-mesa",
         "nixpkgs-patched": "nixpkgs-patched",
         "nixpkgs-stable": "nixpkgs-stable_2",
         "nu_scripts": "nu_scripts",

flake.nix

@@ -36,7 +36,8 @@
     # Official NixOS package source, using nixos's unstable branch by default
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-25.11";
-    # nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    # revert mesa to 25.2.6
+    nixpkgs-mesa.url = "github:nixos/nixpkgs/2b1f0ea3ee3952e68b164efa0a1c5e394ef2e781";
 
     # nixpkgs with some custom patches
     nixpkgs-patched.url = "github:ryan4yin/nixpkgs/nixos-unstable-patched";

hosts/12kingdoms-shoukei/apple-silicon.nix

@@ -2,6 +2,7 @@
   pkgs,
   nixos-apple-silicon,
   my-asahi-firmware,
+  nixpkgs-mesa,
   ...
 }:
 {
@@ -9,6 +10,13 @@
     nixos-apple-silicon.nixosModules.default
   ];
 
+  # Workaround for Mesa 25.3.0 regression
+  # https://github.com/nix-community/nixos-apple-silicon/issues/380
+  # https://github.com/NixOS/nixpkgs/pull/461866
+  hardware.graphics.package =
+    assert pkgs.mesa.version == "25.3.0";
+    (import nixpkgs-mesa { localSystem = pkgs.stdenv.hostPlatform; }).mesa;
+
   nix.settings = {
     extra-substituters = [
       "https://nixos-apple-silicon.cachix.org"