anchor.diff:      maintainers = [ maintainers.eelco ];
     };
   }
  -
  
positive.code: 
    patches = [ ./xfce4-settings-default-icon-theme.patch ];
  
    nativeBuildInputs =
      [ pkgconfig intltool
      ];
  
    buildInputs =
      [ exo gtk libxfce4util libxfce4ui libglade upower xfconf
        xorg.libXi xorg.libXcursor libwnck libnotify libxklavier garcon
      ]; #TODO: optional packages
  
    configureFlags = [ "--enable-pluggable-dialogs" "--enable-sound-settings" ];
  
  
negative.code: { stdenv, fetchurl, pkgconfig, intltool, exo, gtk, garcon, libxfce4util
  , libxfce4ui, xfconf, libXi, upower ? null, libnotify ? null
  , libXcursor ? null, xf86inputlibinput ? null, libxklavier ? null }:
  
  let
    p_name  = "xfce4-settings";
    ver_maj = "4.12";
  