anchor.diff:      virtualbox = import ../applications/virtualization/virtualbox {
         stdenv = stdenv_32bit;
         inherit fetchurl lib iasl dev86 libxslt libxml2 SDL hal
  -          libcap libpng zlib kernel python which alsaLib curl glib;
  -      qt4 = qt45;
  +          libcap libpng zlib kernel python which alsaLib curl glib qt4;
         inherit (xlibs) xproto libX11 libXext libXcursor;
         inherit (gnome) libIDL;
       };
  
positive.code: 
    };
  
    kde4 = kde43;
    
    kde43 = makeOverridable (import ../desktops/kde-4.3) (pkgs // {
      openexr = openexr_1_6_1;
  
negative.code: 
    qtscriptgenerator = makeOverridable (import ../development/libraries/qtscriptgenerator) {
      inherit stdenv fetchurl;
      qt4 = qt46;
    };
  
    readline = readline6;
  