anchor.diff:  { lib
   , buildPythonPackage
   , fetchPypi
  -, fetchpatch
   , isPy3k
   , pytestCheckHook
   , sphinx
  
positive.code:      "test_unix_ssl_server" # socket bind error on hydra when built with other packages
     ];
  
    meta = with lib; {
      homepage = "https://github.com/dabeaz/curio";
      description = "Library for performing concurrent I/O with coroutines in Python 3";
      license = licenses.bsd3;
      maintainers = [ maintainers.marsam ];
    };
  
negative.code: 
  buildPythonPackage rec {
    pname = "curio";
    version = "1.5";
    disabled = !isPy3k;
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "sha256-rwghLlkLt9qOTMOcQgEnEUlNwg1iLxYhVbopbMLjvBA=";
    };
  
    checkInputs = [
      pytestCheckHook
      sphinx
    ];
  
    __darwinAllowLocalNetworking = true;
  
  