anchor.diff:      sha256 = "0d24fk0cbp29gmkysrwq05vry13swmwi3vx3cpcy04c0ixz33ykz";
     };
   
  -  checkInputs = [ filelock mock pytest_4 pep8 ];
  -
  -  # several tests require network connectivity: we disable them.
  -  # also py2.7's tk is over-eager in trying to open an x display,
  -  # so give it xvfb
  -  checkPhase = let
  -    maybeXvfbRun = lib.optionalString isPy27 "${xvfb_run}/bin/xvfb-run";
  -  in ''
  -    export HOME=$(mktemp -d)
  -    ${maybeXvfbRun} pytest --pyargs cartopy \
  -      -m "not network and not natural_earth" \
  -      -k "not test_nightshade_image and not background_img"
  -  '';
  -
  -  nativeBuildInputs = [
  -    cython
  -    geos # for geos-config
  -    proj_5
  +  patches = [
  +    # Fix numpy-1.20 compatibility.  Will be part of 0.19.
  +    (fetchpatch {
  +      url = "https://github.com/SciTools/cartopy/commit/e663bbbef07989a5f8484a8f36ea9c07e61d14ce.patch";
  +      sha256 = "061kbjgzkc3apaz6sxy00pkgy3n9dxcgps5wzj4rglb5iy86n2kq";
  +    })
     ];
   
     buildInputs = [
  -    geos proj_5
  +    geos proj
     ];
   
     propagatedBuildInputs = [
  
positive.code: { buildPythonPackage, lib, fetchPypi
  , pytest_4, filelock, mock, pep8
  , cython, isPy27
  , six, pyshp, shapely, geos, numpy
  , gdal, pillow, matplotlib, pyepsg, pykdtree, scipy, owslib, fiona
  , xvfb_run
  , proj_5 # see https://github.com/SciTools/cartopy/pull/1252 for status on proj 6 support
  }:
  
  buildPythonPackage rec {
  
negative.code:     gdal pillow matplotlib pyepsg pykdtree scipy fiona owslib
    ];
  
    checkInputs = [ pytestCheckHook filelock mock pep8 ];
  
    pytestFlagsArray = [
      "--pyargs" "cartopy"
      "-m" "'not network and not natural_earth'"
    ];
  
    disabledTests = [
      "test_nightshade_image"
      "background_img"
    ];
  
    nativeBuildInputs = [
      cython
      geos # for geos-config
      proj
    ];
  
    meta = with lib; {
      description = "Process geospatial data to create maps and perform analyses";
      license = licenses.lgpl3;
      homepage = "https://scitools.org.uk/cartopy/docs/latest/";
      maintainers = with maintainers; [ mredaelli ];
    };
  }
  