anchor.diff:      inherit fetchurl stdenv zlib gd texinfo readline emacs;
       inherit (xlibs) libX11 libXt libXaw libXpm;
       x11Support = getPkgConfig "gnuplot" "x11" false;
  -    wxGTK = if getPkgConfig "gnuplot" "wxGtk" false then wxGTK28 else null;
  +    wxGTK = if getPkgConfig "gnuplot" "wxGtk" false then wxGTK else null;
       inherit (gtkLibs) pango;
       inherit cairo pkgconfig;
     };
  
positive.code:   mcrl2 = import ../tools/misc/mcrl2 {
      inherit fetchurl stdenv mesa ;
      inherit (xorg) libX11;
      wxGTK = wxGTK28 ;
    };
  
    syslogng = import ../tools/misc/syslog-ng {
  
negative.code:     inherit (xlibs) libXt;
    };
  
    wxGTK = wxGTK28;
  
    wxGTK26 = import ../development/libraries/wxGTK-2.6 {
      inherit fetchurl stdenv pkgconfig;
      inherit (gtkLibs216) gtk;
      inherit (xlibs) libXinerama libSM libXxf86vm xf86vidmodeproto;
    };
  
  