{
  ...
}:
{
  # services.greetd.settings.default_session.command =
  #   lib.mkForce ''${lib.getExe' pkgs.coreutils "env"} XCURSOR_THEME="''${XCURSOR_THEME:-Pop}" ${lib.getExe' config.services.displayManager.cosmic-greeter.package "cosmic-greeter-start"}'';
  # services.greetd.settings.default_session.user = lib.mkForce "cosmic-greeter";
  jovian = {
    steam = {
      enable = true;
      autoStart = true;
      user = "matt";
      desktopSession = "cosmic";
    };

    steamos = {
      useSteamOSConfig = true;
    };

    devices.steamdeck.enable = false;

    hardware.has.amd.gpu = true;
  };

  # specialisation."vanilla".configuration = {
  #   services.desktopManager.gdm.enable = true;
  #   jovian = {
  #     steam = {
  #       enable = true;
  #       autoStart = false;
  #       user = "deck";
  #       desktopSession = "gnome";
  #     };

  #     steamos = {
  #       useSteamOSConfig = true;
  #     };

  #     devices = {
  #       steamdeck = {
  #         enable = true;
  #         enableGyroDsuService = true; # If enabled, motion data from the gyroscope can be used in Cemu with Cemuhoo
  #       };
  #     };

  #     hardware.has.amd.gpu = true;
  #   };
  # };
}