anchor.diff:    packagesToSkipCheck = [
       "Rmpi" # tries to run MPI processes
       "gmatrix" # requires CUDA runtime
  +    "gputools" # requires CUDA runtime
       "sprint" # tries to run MPI processes
       "pbdMPI" # tries to run MPI processes
     ];
  
positive.code:     RPushbullet = [ pkgs.which ];
      qtpaint = [ pkgs.cmake ];
      qtbase = [ pkgs.cmake pkgs.perl ];
      gmatrix = [ pkgs.cudatoolkit ];
      RCurl = [ pkgs.curl.dev ];
      R2SWF = [ pkgs.pkgconfig ];
      rggobi = [ pkgs.pkgconfig ];
  
negative.code:     affyio = [ pkgs.zlib.dev ];
      VariantAnnotation = [ pkgs.zlib.dev ];
      snpStats = [ pkgs.zlib.dev ];
      gputools = [ pkgs.pcre.dev pkgs.lzma.dev pkgs.zlib.dev pkgs.bzip2.dev pkgs.icu.dev ];
    };
  
    packagesWithBuildInputs = {
  