anchor.diff:      "--with-pg=${postgresql}/bin/pg_config"
       "--with-mysql=${mysql.lib}/bin/mysql_config"
       "--with-geotiff=${libgeotiff}"
  -    "--with-python"               # optional
       "--with-static-proj4=${proj}" # optional
       "--with-geos=${geos}/bin/geos-config"# optional
  +    # Enabling built-in python bindings causes
  +    # http://hydra.nixos.org/build/21344907/nixlog/1/raw - disable for now
  +    #"--with-python"               # optional
     ];
   
     meta = {
  
positive.code:     license = stdenv.lib.licenses.mit;
      maintainers = [ stdenv.lib.maintainers.marcweber ];
      platforms = stdenv.lib.platforms.linux;
      broken = true; # http://hydra.nixos.org/build/21344907/nixlog/1/raw
    };
  })
  
negative.code: { stdenv, fetchurl, composableDerivation, unzip, libjpeg, libtiff, zlib
  , postgresql, mysql, libgeotiff, proj, geos, openssl
  , libpng
  # disabling python for now
  # , python, pythonPackages
  }:
  
  composableDerivation.composableDerivation {} (fixed: rec {
    version = "1.11.2";
  