anchor.diff:      owner = "nats-io";
       repo = "nats.py";
       rev = "refs/tags/v${version}";
  -    hash = "sha256-K2ugTwfeYrdBnXFV9SHNQP+fNvUmc1yuy53gpGmmvS0=";
  +    hash = "sha256-w+YySX9RNXUttt7iLg/Efh8bNzmhIQTKMXcoPO1k4lI=";
     };
   
     propagatedBuildInputs = [
  +    aiohttp
       ed25519
     ];
   
  
positive.code: 
  buildPythonPackage rec {
    pname = "nats-py";
    version = "2.1.7";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
negative.code: { lib
  , stdenv
  , aiohttp
  , buildPythonPackage
  , ed25519
  , fetchFromGitHub
  