anchor.diff:  buildPythonPackage rec {
     pname = "azure-keyvault-secrets";
     version = "4.4.0";
  -  disabled = isPy27;
  +  format = "setuptools";
  +
  +  disabled = pythonOlder "3.6";
   
     src = fetchPypi {
       inherit pname version;
       extension = "zip";
  -    sha256 = "sha256-wLcy253oVdnDl2YGfPQ+L2bNuyi4WfA8eH4zkkzKgtc=";
  +    hash = "sha256-wLcy253oVdnDl2YGfPQ+L2bNuyi4WfA8eH4zkkzKgtc=";
     };
   
     propagatedBuildInputs = [
  
positive.code:     msrest
    ];
  
    pythonNamespaces = [ "azure.keyvault" ];
  
    # requires checkout from mono-repo
    doCheck = false;
  
negative.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pythonOlder
  , azure-common
  , azure-core
  , msrest
  