anchor.diff:        --replace "cmdclass=versioneer.get_cmdclass()," ""
     '';
   
  -  checkPhase = ''
  -    pytest
  -  '';
  +  disabledTests = [
  +    "test_argwhere_str"
  +    "test_count_nonzero_str"
  +  ];
   
     meta = {
       description = "Minimal task scheduling abstraction";
  
positive.code: 
  buildPythonPackage rec {
    pname = "dask";
    version = "2.10.1";
  
    disabled = pythonOlder "3.5";
  
  
negative.code:     owner = "dask";
      repo = pname;
      rev = version;
      sha256 = "0kj46pwzvdw8ii1h45y48wxvjid89yp4cfak2h4b8z8xic73fqgj";
    };
  
    checkInputs = [
      pytestCheckHook
    ];
  
    dontUseSetuptoolsCheck = true;
  
    propagatedBuildInputs = [
      bokeh
  