turned nixgl into flake input

flake.nix

@@ -8,6 +8,10 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
     _1password-shell-plugins.url = "github:1Password/shell-plugins";
+    nixgl = {
+      url = "github:nix-community/nixGL";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = { self, nixpkgs, ... }@inputs:
@@ -77,7 +81,10 @@
 
         home-manager = {
           useUserPackages = true;
-          extraSpecialArgs = { inherit inputs; };
+          extraSpecialArgs = { 
+            inherit inputs; 
+            nixgl-pkgs = inputs.nixgl.packages.${system};
+          };
           users = {
             ${config.user} = {
               imports = mkhomeManagerModules config;