nixos-icons: white.svg -> nix-snowflake-white.svg (#343)

These files were renamed in upstream nixos-artwork and merged into nixpkgs 2 days ago.

- ce919b8180
- https://github.com/NixOS/nixpkgs/pull/303068

Additionally, the source root of the package has been moved, so we patch the `src` directly
rather than using mkDerivation's `patchPhase`.

flake.lock

@@ -218,11 +218,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1711715736,
-        "narHash": "sha256-9slQ609YqT9bT/MNX9+5k5jltL9zgpn36DpFB7TkttM=",
+        "lastModified": 1713596654,
+        "narHash": "sha256-LJbHQQ5aX1LVth2ST+Kkse/DRzgxlVhTL1rxthvyhZc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "807c549feabce7eddbf259dbdcec9e0600a0660d",
+        "rev": "fd16bb6d3bcca96039b11aa52038fafeb6e4f4be",
         "type": "github"
       },
       "original": {

modules/nixos-icons/nixos.nix

@@ -8,17 +8,20 @@ with config.lib.stylix.colors;
 
   config.nixpkgs.overlays = lib.mkIf config.stylix.targets.nixos-icons.enable [(self: super: {
     nixos-icons = super.nixos-icons.overrideAttrs (oldAttrs: {
-      patchPhase = ''
-        substituteInPlace logo/white.svg --replace-fail '#ffffff' '#${base05}'
+      src = pkgs.applyPatches {
+        src = oldAttrs.src;
+        prePatch = ''
+          substituteInPlace logo/nix-snowflake-white.svg --replace-fail '#ffffff' '#${base05}'
 
           # Insert attribution comment after the XML prolog
           sed \
             --in-place \
             '2i<!-- The original NixOS logo from ${oldAttrs.src.url} is licensed under https://creativecommons.org/licenses/by/4.0 and has been modified to match the ${scheme} color scheme. -->' \
-          logo/white.svg
+            logo/nix-snowflake-white.svg
 
-        ${lib.getExe pkgs.resvg} logo/white.svg logo/white.png
+          ${lib.getExe pkgs.resvg} logo/nix-snowflake-white.svg logo/nix-snowflake-white.png
       '';
+      };
     });
   })];
 }