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:       url = "mirror://pypi/p/pytest-django/${name}.tar.gz";
        sha256 = "1mmc7zsz3dlhs6sx4sppkj1vgshabi362r1a8b8wpj1qfximpqcb";
      };
      
      # doing this to allow depending packages to find
      # pytest's binaries
      pytest = self.pytest;
  
negative.code:       license = licenses.lgpl3;
      };
    };
  
  
    pathtools = buildPythonPackage rec {
      name = "pathtools-${version}";
  