Replace customPkgs with pkgs.custom and add pkgs.unstable and flake update

home/home-darwin-work.nix

@@ -1,12 +1,9 @@
 { config, lib, pkgs, globalInputs, system, ... }:
 
 let
-  customPkgs = pkgs.callPackage ../packages {};
   leader = "cmd"; # Change this to experiment with different leader keys (e.g., "cmd", "ctrl")
 in
 {
-  # Provide arguments to role modules
-  _module.args = { inherit customPkgs; };
   # Home Manager configuration for Darwin work laptop
   # Corporate-friendly setup with essential development tools