nixos-configuration/modules/desktop/gnome.nix

{
  config,
  pkgs,
  lib,
  ...
}: let
  isEnabled = config.my.desktop.enableGnome;
in {
  options.my.desktop.enableGnome = lib.mkEnableOption "gnome desktop";

  config = lib.mkIf isEnabled {
    my.desktop.enable = true;

    services = {
      xserver = {
        # Enable the GNOME Desktop Environment.
        displayManager.gdm.enable = true;
        desktopManager.gnome.enable = true;
      };

      gnome = {
        tracker-miners.enable = false;
        tracker.enable = false;
      };
    };

    programs.gpaste.enable = true;

    environment = {
      systemPackages = with pkgs; [
        gnomeExtensions.gsconnect
      ];

      # remove some gnome default apps
      gnome.excludePackages = with pkgs.gnome; [
        cheese # photo booth
        epiphany # web browser
        evince # document viewer
        geary # email client
        seahorse # password manager
        gnome-clocks
        gnome-maps
        gnome-weather
        gnome-music
        pkgs.gnome-connections
      ];
    };
  };
}