anchor.diff:      "PredictABEL"
       "prefmod"
       "PrevMap"
  -    "ProbForecastGOP"
       "r4ss"
       "RandomFields"
       "rareNMtests"
  
positive.code:     "DeducerText"
      "Demerelate"
      "detrendeR"
      "dgmb"
      "dpa"
      "DSpat"
      "dynamicGraph"
      "dynBiplotGUI"
      "EasyqpcR"
  
negative.code:     Cardinal = [ pkgs.which ];
      chebpol = [ pkgs.fftw ];
      ChemmineOB = [ pkgs.openbabel pkgs.pkg-config ];
      curl = [ pkgs.curl.dev ];
      data_table = [pkgs.zlib.dev] ++ lib.optional stdenv.isDarwin pkgs.llvmPackages.openmp;
      devEMF = [ pkgs.xorg.libXft.dev pkgs.x11 ];
  