anchor.diff:      colorcet
       param
       pyct
  -    pyyaml
  -    requests
  -    scikitimage
       scipy
  -    testpath
     ];
   
     checkInputs = [
       pytestCheckHook
  -    pytest-benchmark
       pytest-xdist # not needed
  -    flake8
       nbsmoke
       fastparquet
  -    pandas
       nbconvert
  +    netcdf4
     ];
  -
  -  # dask doesn't do well with large core counts
  -  # checkPhase = ''
  -  #   pytest -n $NIX_BUILD_CORES datashader -k 'not dask.array and not test_simple_nested'
  -  # '';
   
     pytestFlagsArray = [
       "-n $NIX_BUILD_CORES"
       "datashader"
     ];
   
  -  meta = with lib; {
  +  disabledTestPaths = [
  +    # 31/50 tests fail with TypeErrors
  +    "datashader/tests/test_datatypes.py"
  +  ];
  +
  +  meta = with lib;{
       description = "Data visualization toolchain based on aggregating into a grid";
       homepage = "https://datashader.org";
       license = licenses.bsd3;
  
positive.code: , colorcet
  , param
  , pyct
  , pyyaml
  , requests
  , scikitimage
  , scipy
  , pytestCheckHook
  , pytest-benchmark
  , flake8
  , nbsmoke
  , fastparquet
  , testpath
  , nbconvert
  , pytest-xdist
  }:
  
  buildPythonPackage rec {
    pname = "datashader";
    version = "0.11.1";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "b1f80415f72f92ccb660aaea7b2881ddd35d07254f7c44101709d42e819d6be6";
    };
  
    patches = [
      (fetchpatch {
        # Unpins pyct==0.46 (Sep. 11, 2020).
        # Will be incorporated into the next datashader release after 0.11.1
        url = "https://github.com/holoviz/datashader/pull/960/commits/d7a462fa399106c34fd0d44505a8a73789dbf874.patch";
        sha256 = "1wqsk9dpxnkxr49fa7y5q6ahin80cvys05lnirs2w2p1dja35y4x";
      })
    ];
  
    propagatedBuildInputs = [
      dask
      distributed
      bokeh
      toolz
      datashape
  
negative.code: { lib
  , buildPythonPackage
  , fetchPypi
  , dask
  , bokeh
  , toolz
  , datashape
  