{}: let
in {
  mkSimpleTrayService = {execStart}: {
    Unit = {
      Description = "pasystray applet";
      After = ["graphical-session-pre.target"];
      PartOf = ["graphical-session.target"];
    };

    Install = {WantedBy = ["graphical-session.target"];};

    Service = {ExecStart = execStart;};
  };
}