{ config, unstable, ... }: {
  # Use "unstable" instead of "pkgs" to get the latest packages, defined in "flake.nix"
  services.xserver = with unstable.pkgs; {
    # https://nixos.org/manual/nixos/stable/index.html#chap-gnome
    # Enable the GNOME Desktop Environment.
    displayManager.ssdm.enable = true;
    desktopManager.kde.enable = true;
    displayManager.defaultSession = "plastmawayland";
  };
}