anchor.diff:  
   buildPythonPackage rec {
     pname = "msrest";
  -  version = "0.6.21";
  +  version = "0.7.1";
     format = "setuptools";
   
     disabled = pythonOlder "3.7";
  
positive.code: { lib
  , aiodns
  , aiohttp
  , buildPythonPackage
  , certifi
  , fetchFromGitHub
  
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
  