anchor.diff:  , aiodns
   , pytest
   , httpretty
  +, trio
   }:
   
   buildPythonPackage rec {
     version = "0.6.4";
     pname = "msrest";
   
  -  #src = fetchPypi {
  -  #  inherit pname version;
  -  #  sha256 = "5dadd54bec98d52cd9f43fb095015c346135b8cafaa35f24c7309cc25d3ad266";
  -  #};
  -
  +  # no tests in PyPI tarball
  +  # see https://github.com/Azure/msrest-for-python/pull/152
     src = fetchFromGitHub {
       owner = "Azure";
       repo = "msrest-for-python";
  
positive.code:     aiohttp aiodns
    ];
  
    checkInputs = [ pytest httpretty ];
  
    checkPhase = ''
      pytest tests/
    '';
  
    meta = with lib; {
  
negative.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , pythonAtLeast
  , requests
  , requests_oauthlib
  , isodate
  