anchor.diff:  , buildPythonPackage
   , fetchFromGitHub
   , fsspec
  -, pytest
  +, pytestCheckHook
   , pythonOlder
   , cloudpickle
   , numpy
  
positive.code:       --replace "cmdclass=versioneer.get_cmdclass()," ""
    '';
  
    checkPhase = ''
      pytest
    '';
  
    meta = {
      description = "Minimal task scheduling abstraction";
  
negative.code:     owner = "dask";
      repo = pname;
      rev = version;
      sha256 = "0kj46pwzvdw8ii1h45y48wxvjid89yp4cfak2h4b8z8xic73fqgj";
    };
  
    checkInputs = [
      pytestCheckHook
    ];
  
    dontUseSetuptoolsCheck = true;
  
    propagatedBuildInputs = [
      bokeh
  