anchor.diff:          patchShebangs configure
         '';
   
  -      R_MAKEVARS_SITE = lib.optionalString (pkgs.system == "aarch64-linux")
  +      R_MAKEVARS_SITE = lib.optionalString (pkgs.stdenv.system == "aarch64-linux")
           (pkgs.writeText "Makevars" ''
             CXX14PICFLAGS = -fPIC
           '');
  
positive.code:     Biostrings = [ pkgs.zlib ];
      bnpmr = [ pkgs.gsl ];
      cairoDevice = [ pkgs.gtk2.dev ];
      Cairo = with pkgs; [ libtiff libjpeg cairo.dev x11 fontconfig.lib ];
      Cardinal = [ pkgs.which ];
      chebpol = [ pkgs.fftw ];
      ChemmineOB = with pkgs; [ openbabel pkg-config ];
      curl = [ pkgs.curl.dev ];
      data_table = [ pkgs.zlib.dev ] ++ lib.optional stdenv.isDarwin pkgs.llvmPackages.openmp;
      devEMF = with pkgs; [ xorg.libXft.dev x11 ];
      diversitree = with pkgs; [ gsl fftw ];
      exactextractr = [ pkgs.geos ];
      EMCluster = [ pkgs.lapack ];
  
negative.code:     PING = [ pkgs.gsl ];
      RcppAlgos = [ pkgs.gmp.dev ];
      RcppBigIntAlgos = [ pkgs.gmp.dev ];
      HilbertVisGUI = [ pkgs.gtkmm2.dev ];
      textshaping = with pkgs; [ harfbuzz.dev freetype.dev fribidi libpng ];
      DropletUtils = [ pkgs.zlib.dev ];
      RMariaDB = [ pkgs.libmysqlclient.dev ];
  