Gnome: move repo to flake input

flake.lock

@@ -131,6 +131,25 @@
         "type": "github"
       }
     },
+    "gnome-triplebuffering": {
+      "flake": false,
+      "locked": {
+        "host": "gitlab.gnome.org",
+        "lastModified": 1722924508,
+        "narHash": "sha256-C2VfW3ThPEZ37YkX7ejlyumLnWa9oij333d5c4yfZxc=",
+        "owner": "vanvugt",
+        "repo": "mutter",
+        "rev": "29a72bfb0bdb060d91196c57dc1940e5049858ed",
+        "type": "gitlab"
+      },
+      "original": {
+        "host": "gitlab.gnome.org",
+        "owner": "vanvugt",
+        "ref": "triple-buffering-v4-46",
+        "repo": "mutter",
+        "type": "gitlab"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -340,6 +359,7 @@
     },
     "root": {
       "inputs": {
+        "gnome-triplebuffering": "gnome-triplebuffering",
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",
         "lix-module": "lix-module",

flake.nix

@@ -38,6 +38,13 @@
       url = "git+file:./secrets";
       flake = false;
     };
+
+    # Repository for Gnome triple buffering patch
+    # For details, see https://wiki.nixos.org/wiki/GNOME#Dynamic_triple_buffering
+    gnome-triplebuffering = {
+      url = "gitlab:vanvugt/mutter/triple-buffering-v4-46?host=gitlab.gnome.org";
+      flake = false;
+    };
   };
 
   outputs =

modules/ui/desktops/gnome.nix

@@ -1,5 +1,6 @@
 # Enables the Gnome desktop environment.
 {
+  inputs,
   pkgs,
   config,
   lib,
@@ -103,20 +104,12 @@ in
     };
 
     nixpkgs.overlays = lib.mkIf cfg.experimentalFeatures.enable [
-      # GNOME 46: triple-buffering-v4-46
-      # For details, see https://wiki.nixos.org/wiki/GNOME#Dynamic_triple_buffering
       (final: prev: {
         gnome = prev.gnome.overrideScope (
           gnomeFinal: gnomePrev: {
             mutter = gnomePrev.mutter.overrideAttrs (old: {
-              src = pkgs.fetchFromGitLab {
-                domain = "gitlab.gnome.org";
-                owner = "vanvugt";
-                repo = "mutter";
-                rev = "triple-buffering-v4-46";
-                hash = "sha256-C2VfW3ThPEZ37YkX7ejlyumLnWa9oij333d5c4yfZxc=";
-              };
-
+              # Triple buffering
+              src = inputs.gnome-triplebuffering;
               # Scaling patch sourced from https://aur.archlinux.org/packages/mutter-xwayland-scaling
               patches = [ ./patches/gnome-mutter-xwayland-scaling.patch ];
             });