add: gallium-nine

flake.nix

@@ -44,7 +44,14 @@
         copetch = inputs.copetch.packages.${system}.default;
       };
 
-    in {
+      mesaOverlay = final: prev: {
+        mesa = prev.mesa.overrideAttrs (old: {
+          mesonFlags = (old.mesonFlags or [ ]) ++ [ "-Dgallium-nine=true" ];
+        });
+      };
+
+    in
+    {
       nixosConfigurations = {
         copland = nixpkgs.lib.nixosSystem {
           specialArgs = {
@@ -59,7 +66,7 @@
             home-manager.nixosModules.home-manager
 
             {
-            nixpkgs.overlays = [ chaoticOverlay cachyosKernelOverlay ];
+              nixpkgs.overlays = [ chaoticOverlay cachyosKernelOverlay copetchOverlay mesaOverlay ];
               nixpkgs.config.allowUnfree = true;
             }