anchor.diff:          pkgs.xfce.xfce4_appfinder
           pkgs.xfce.tumbler       # found via dbus
         ]
  +      ++ optional cfg.enableXfwm pkgs.xfce.xfwm4
         ++ optional config.powerManagement.enable pkgs.xfce.xfce4_power_manager
         ++ optional config.networking.networkmanager.enable pkgs.networkmanagerapplet
         ++ optionals (!cfg.noDesktop)
  
positive.code:         description = ''
            Shell commands executed just before XFCE is started.
          '';
        };
      };
  
  
negative.code:         pkgs.xfce.xfce4volumed
          pkgs.xfce.xfce4-screenshooter
          pkgs.xfce.xfconf
          # This supplies some "abstract" icons such as
          # "utilities-terminal" and "accessories-text-editor".
          pkgs.gnome3.defaultIconTheme
  