nixgl flake input attempt

homeManagerModules/ghostty.nix

@@ -1,12 +1,11 @@
-{ config, pkgs, lib, ... }:
+{ config, pkgs, lib, nixgl, ... }:
 {
   home.sessionVariables = lib.mkIf (config.enableShell && config.graphical) {
     TERMINAL = "ghostty";
   };
   
-  # https://github.com/nix-community/nixGL?tab=readme-ov-file#nix-channel-recommended
-  # nix-channel --add https://github.com/nix-community/nixGL/archive/main.tar.gz nixgl && nix-channel --update
-  nixGL.packages = import <nixgl> { inherit pkgs; };
+  # nixGL is now provided as a flake input
+  nixGL.packages = nixgl.packages.${pkgs.system};
   nixGL.defaultWrapper = "mesa";
   nixGL.installScripts = [ "mesa" ];