diff --git a/flake.nix b/flake.nix
index 0c27e1f..7e1127f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,11 +1,20 @@
 {
-  inputs.mesa-src = {
-    url = "git+https://gitlab.freedesktop.org/mesa/mesa?ref=main";
-    flake = false;
+  description = "Ivy Bridge Custom Mesa";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    mesa-src = {
+      url = "git+https://gitlab.freedesktop.org/mesa/mesa?rev=1a8953c9562d779f2d2730900a85ab5f446fff12";
+      flake = false;
+    };
   };
 
-  outputs = { self, nixpkgs, mesa-src }: {
-    mesa-custom = nixpkgs.legacyPackages.x86_64-linux.mesa.overrideAttrs (old: {
+  outputs = { self, nixpkgs, mesa-src }: 
+  let
+    system = "x86_64-linux";
+    pkgs = import nixpkgs { inherit system; };
+  in {
+    packages.${system}.mesa-custom = pkgs.mesa.overrideAttrs (old: {
       src = mesa-src;
       patches = [ ./hd4000-custom.patch ];
     });