anchor.diff:      RGtk2 = [ pkgs.gtk2 ];
       Rhpc = [ pkgs.zlib pkgs.bzip2 pkgs.icu pkgs.lzma pkgs.openmpi pkgs.pcre ];
       Rhtslib = [ pkgs.zlib ];
  -    ridge = [ pkgs.gsl ];
  +    ridge = [ pkgs.gsl_1 ];
       RJaCGH = [ pkgs.zlib ];
       rjags = [ pkgs.jags ];
       rJava = [ pkgs.zlib pkgs.bzip2 pkgs.icu pkgs.lzma pkgs.pcre pkgs.jdk pkgs.libzip ];
  -    Rlibeemd = [ pkgs.gsl ];
  +    Rlibeemd = [ pkgs.gsl_1 ];
       rmatio = [ pkgs.zlib ];
       Rmpfr = [ pkgs.gmp pkgs.mpfr ];
       Rmpi = [ pkgs.openmpi ];
  
positive.code:   };
  
    packagesWithNativeBuildInputs = {
      abn = [ pkgs.gsl ];
      adimpro = [ pkgs.imagemagick ];
      audio = [ pkgs.portaudio ];
      BayesSAE = [ pkgs.gsl ];
      BayesVarSel = [ pkgs.gsl ];
      BayesXsrc = [ pkgs.readline pkgs.ncurses ];
      bigGP = [ pkgs.openmpi ];
      BiocCheck = [ pkgs.which ];
      Biostrings = [ pkgs.zlib ];
      bnpmr = [ pkgs.gsl ];
      BNSP = [ pkgs.gsl ];
      cairoDevice = [ pkgs.gtk2 ];
      Cairo = [ pkgs.libtiff pkgs.libjpeg pkgs.cairo ];
      Cardinal = [ pkgs.which ];
      chebpol = [ pkgs.fftw ];
      ChemmineOB = [ pkgs.openbabel pkgs.pkgconfig ];
      cit = [ pkgs.gsl ];
      curl = [ pkgs.curl ];
      devEMF = [ pkgs.xorg.libXft ];
      diversitree = [ pkgs.gsl pkgs.fftw ];
      EMCluster = [ pkgs.liblapack ];
      fftw = [ pkgs.fftw ];
      fftwtools = [ pkgs.fftw ];
      Formula = [ pkgs.gmp ];
      geoCount = [ pkgs.gsl ];
      git2r = [ pkgs.zlib pkgs.openssl ];
      GLAD = [ pkgs.gsl ];
      glpkAPI = [ pkgs.gmp pkgs.glpk ];
      gmp = [ pkgs.gmp ];
      graphscan = [ pkgs.gsl ];
      gsl = [ pkgs.gsl ];
      HiCseg = [ pkgs.gsl ];
      iBMQ = [ pkgs.gsl ];
      igraph = [ pkgs.gmp ];
      JavaGD = [ pkgs.jdk ];
      jpeg = [ pkgs.libjpeg ];
      KFKSDS = [ pkgs.gsl ];
      kza = [ pkgs.fftw ];
      libamtrack = [ pkgs.gsl ];
      mixcat = [ pkgs.gsl ];
      mvabund = [ pkgs.gsl ];
      mwaved = [ pkgs.fftw ];
      ncdf4 = [ pkgs.netcdf ];
      ncdf = [ pkgs.netcdf ];
      nloptr = [ pkgs.nlopt ];
      openssl = [ pkgs.openssl ];
      outbreaker = [ pkgs.gsl ];
      pander = [ pkgs.pandoc pkgs.which ];
      pbdMPI = [ pkgs.openmpi ];
      pbdNCDF4 = [ pkgs.netcdf ];
  
negative.code:     proj4 = [ pkgs.proj ];
      qtbase = [ pkgs.qt4 ];
      qtpaint = [ pkgs.qt4 ];
      R2GUESS = [ pkgs.gsl_1 ];
      R2SWF = [ pkgs.zlib pkgs.libpng pkgs.freetype ];
      RAppArmor = [ pkgs.libapparmor ];
      rapportools = [ pkgs.which ];
  