anchor.diff:  { lib
   , aiodns
   , aiohttp
  +, azure-core
   , buildPythonPackage
   , certifi
   , fetchFromGitHub
  
positive.code: 
  buildPythonPackage rec {
    pname = "msrest";
    version = "0.6.21";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
negative.code:   src = fetchFromGitHub {
      owner = "Azure";
      repo = "msrest-for-python";
      # no tag for 0.7.1
      rev = "2d8fd04f68a124d0f3df7b81584accc3270b1afc";
      hash = "sha256-1EXXXflhDeU+erdI+NsWxSX76ooDTl3+MyQwRzm2xV0=";
    };
  
    propagatedBuildInputs = [
      azure-core
      aiodns
      aiohttp
      certifi
  