anchor.diff:  
     meta = {
       description = "Translator library for raster geospatial data formats";
  -    homepage = https://www.gdal.org/;
  +    homepage = "https://www.gdal.org/";
       license = stdenv.lib.licenses.mit;
       maintainers = [ stdenv.lib.maintainers.marcweber ];
       platforms = with stdenv.lib.platforms; linux ++ darwin;
  
positive.code: { stdenv, fetchFromGitHub, fetchpatch, unzip, libjpeg, libtiff, zlib
  , postgresql, libmysqlclient, libgeotiff, pythonPackages, proj, geos, openssl
  , libpng, sqlite, libspatialite, poppler, hdf4, qhull, giflib, expat
  , libiconv, libxml2, autoreconfHook
  , netcdfSupport ? true, netcdf, hdf5, curl
  }:
  
  with stdenv.lib;
  
  
negative.code:   # - Unset CC and CXX as they confuse libtool.
    # - teach gdal that libdf is the legacy name for libhdf
    preConfigure = ''
      substituteInPlace configure \
      --replace "-lmfhdf -ldf" "-lmfhdf -lhdf"
    '';
  
    preBuild = ''
      substituteInPlace swig/python/GNUmakefile \
  