anchor.diff:      description = "Reusable state for writing clean tests and more";
       homepage = "https://pypi.python.org/pypi/fixtures";
       license = lib.licenses.asl20;
  -    broken = isPy39; # see https://github.com/testing-cabal/fixtures/issues/44
     };
   }
  
positive.code:     inherit pname version;
      sha256 = "fcf0d60234f1544da717a9738325812de1f42c2fa085e2d9252d8fff5712b2ef";
    };
  
    nativeBuildInputs = [
      pbr
  
negative.code: { lib
  , buildPythonPackage
  , fetchPypi
  , fetchpatch
  , pythonAtLeast
  , pbr
  , testtools
  , mock
  , python
  }:
  
  buildPythonPackage rec {
  