anchor.diff:    };
   
     services = {
  -    gnome3.chrome-gnome-shell.enable = true;
       physlock.enable = true;
       fwupd.enable = true;
   
  
positive.code:       /etc/nixos/hardware-configuration.nix
      ];
  
    nixpkgs.config = {
      allowUnfree = true;
      packageOverrides = pkgs: {
        vaapiIntel = pkgs.vaapiIntel.override { enableHybridCodec = true; };
        unstable = import unstableTarball {
          config = config.nixpkgs.config;
        };
      };
  
negative.code: { config, pkgs, ... }:
  
  let
    unstableTarball = fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz;
  in
  {
    imports =
  