anchor.diff:  { lib
   , buildPythonPackage
  -, fetchFromGitHub
  +, fetchPypi
   , msrestazure
   , azure-common
   , azure-mgmt-nspkg
  
positive.code:     azure-mgmt-nspkg
    ];
  
    # has no tests
    doCheck = false;
  
    meta = with lib; {
      description = "This is the Microsoft Azure Commerce Management Client Library";
      homepage = "https://github.com/Azure/azure-sdk-for-python";
      license = licenses.mit;
      maintainers = with maintainers; [ mwilsoninsight ];
    };
  }
  
negative.code: , isPy3k
  }:
  
  buildPythonPackage rec {
    pname = "azure-mgmt-commerce";
    version = "1.0.1";
  
    src = fetchPypi {
      inherit pname version;
      extension = "zip";
      sha256 = "1hw4crkgb72ps85m2kz9kf8p2wg9qmaagk3z5nydva9g6bnq93n4";
    };
  
    propagatedBuildInputs = [
      msrestazure
  