anchor.diff:      "EasyqpcR"
       "EcoVirtual"
       "ENiRG"
  -    "EnQuireR"
       "eVenn"
       "exactLoglinTest"
       "fat2Lpoly"
  
positive.code:     RGtk2 = [ pkgs.pkgconfig ];
      RProtoBuf = [ pkgs.pkgconfig ];
      Rpoppler = [ pkgs.pkgconfig ];
      VBmix = [ pkgs.pkgconfig ];
      XML = [ pkgs.pkgconfig ];
      cairoDevice = [ pkgs.pkgconfig ];
      chebpol = [ pkgs.pkgconfig ];
  
negative.code:     udunits2 = [ pkgs.udunits pkgs.expat ];
      V8 = [ pkgs.v8_3_14 ];
      VBLPCM = [ pkgs.gsl_1 ];
      WhopGenome = [ pkgs.zlib.dev ];
      XBRL = [ pkgs.zlib pkgs.libxml2.dev ];
      xml2 = [ pkgs.libxml2.dev ] ++ lib.optionals stdenv.isDarwin [ pkgs.perl ];
  