anchor.diff:      Rpoppler = [ pkgs.poppler ];
       RPostgreSQL = [ pkgs.postgresql ];
       RProtoBuf = [ pkgs.protobuf ];
  -    rpud = [ pkgs.linuxPackages.nvidia_x11 ];
       rPython = [ pkgs.python ];
       RSclient = [ pkgs.openssl ];
       Rserve = [ pkgs.openssl ];
  
positive.code:     qtpaint = [ pkgs.cmake ];
      qtbase = [ pkgs.cmake pkgs.perl ];
      gmatrix = [ pkgs.cudatoolkit ];
      WideLM = [ pkgs.cudatoolkit ];
      RCurl = [ pkgs.curl ];
      R2SWF = [ pkgs.pkgconfig ];
      rggobi = [ pkgs.pkgconfig ];
  
negative.code:     "GSRI" # broken build
      "GSVA" # broken build
      "GUIDE" # depends on broken package rpanel-1.1-3
      "GUIDEseq" # depends on broken package r-BiocGenerics-0.16.1
      "GUIProfiler" # broken build
      "Guitar" # depends on broken package r-GenomicAlignments-1.5.18
      "Gviz" # depends on broken package Rsamtools-1.21.8
  