anchor.diff:      buildInputs = with self; [
         coverage testtools oslosphinx oslotest
       ];
  -    preBuild = ''
  +    patchPhase = ''
  +      sed -i 's@python@${python.interpreter}@' .testr.conf
         sed -i '/ordereddict/d' requirements.txt
       '';
   
  
positive.code:     buildInputs = with self; [
        oslosphinx oslotest memcached pymongo
      ];
    };
  
    pecan = buildPythonPackage rec {
  
negative.code:     ];
  
      patchPhase = ''
        sed -i 's@python@${python.interpreter}@' .testr.conf
        # it has pinned pbr<1.0
        sed -i '/pbr/d' requirements.txt
        # https://github.com/openstack/networking-hyperv/commit/56d66fc012846620a60cb8f18df5a1c889fe0e26
  