{
  pkgs,
  tree,
  ...
}: {
  imports = with tree.nixos.roles; [
    graphical
  ];

  services.xserver.enable = true;
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;
  environment.gnome.excludePackages =
    (with pkgs; [
      gnome-photos
      gnome-tour
    ])
    ++ (with pkgs.gnome; [
      cheese # webcam tool
      gnome-music
      gedit # text editor
      epiphany # web browser
      geary # email reader
      gnome-characters
      tali # poker game
      iagno # go game
      hitori # sudoku game
      atomix # puzzle game
      yelp # Help view
      gnome-contacts
      gnome-initial-setup
    ]);
  programs.dconf.enable = true;
  environment.systemPackages = with pkgs; [
    gnome.gnome-tweaks
    gnome-extension-manager
  ];
}