anchor.diff:    setuptools_scm_18 = self.setuptools_scm.override rec {
       name = "setuptools_scm-${version}";
       version = "1.8.0";
  -    
  +
       # tests fail: ImportError: cannot import name 'find_files'
       disabled = isPy35;
   
  
positive.code:       license = licenses.wtfpl;
      };
    };
  }
  
negative.code:       description = "pytest plugin with mechanisms for caching across test runs";
      };
    };
  
    pytestdjango = buildPythonPackage rec {
      name = "pytest-django-${version}";
      version = "2.9.1";
  