{
  # Enable the GNOME Desktop Environment.
  services.xserver.enable = true;
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;
  services.gnome.gnome-browser-connector.enable = true;
  programs.dconf.enable = true;
  security.polkit.enable = true;
}