nixos/slock: add .package option (for those wishing to override)

          Whether to install slock screen locker with setuid wrapper.

        '';

      };

      package = mkPackageOption pkgs "slock" {};

    };

  };

  config = mkIf cfg.enable {

    environment.systemPackages = [ pkgs.slock ];

    environment.systemPackages = [ cfg.package ];

    security.wrappers.slock =

      { setuid = true;

        owner = "root";

        group = "root";

        source = "${pkgs.slock.out}/bin/slock";

        source = lib.getExe cfg.package;

      };

  };

}