anchor.diff:      "--with-jpeg=${libjpeg.dev}"
       "--with-libtiff=${libtiff.dev}" # optional (without largetiff support)
       "--with-png=${libpng.dev}"      # optional
  +    "--with-poppler=${poppler.dev}" # optional
       "--with-libz=${zlib.dev}"       # optional
       "--with-pg=${postgresql}/bin/pg_config"
       "--with-mysql=${mysql.lib.dev}/bin/mysql_config"
  
positive.code: { stdenv, fetchurl, composableDerivation, unzip, libjpeg, libtiff, zlib
  , postgresql, mysql, libgeotiff, pythonPackages, proj, geos, openssl
  , libpng, sqlite, libspatialite
  , libiconv
  , netcdfSupport ? true, netcdf, hdf5 , curl
  }:
  
negative.code:     sha256 = "0jh7filpf5dk5iz5acj7y3y49ihnzqypxckdlj0sjigbqq6hlsmf";
    };
  
    buildInputs = [ unzip libjpeg libtiff libpng proj openssl sqlite
      libspatialite poppler ]
    ++ (with pythonPackages; [ python numpy wrapPython ])
    ++ stdenv.lib.optional stdenv.isDarwin libiconv
    ++ stdenv.lib.optionals netcdfSupport [ netcdf hdf5 curl ];
  