anchor.diff:  
     sourceRoot = "source/gdal";
   
  -  nativeBuildInputs = [ autoreconfHook ];
  +  nativeBuildInputs = [ autoreconfHook pkg-config ];
   
     buildInputs = [
       unzip
  
positive.code:     giflib
      expat
      libxml2
    ] ++ (with pythonPackages; [ python numpy wrapPython ])
      ++ stdenv.lib.optional stdenv.isDarwin libiconv
      ++ stdenv.lib.optionals netcdfSupport [ netcdf hdf5 curl ];
  
negative.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, pkg-config }:
  
  with stdenv.lib;
  
  