anchor.diff:  { buildPythonPackage
   , fetchPypi
  +, fetchpatch
   , lib
   , pexpect
   , pytest
  
positive.code:     description = "py.test plugin to abort hanging tests";
      homepage = https://bitbucket.org/pytest-dev/pytest-timeout/;
      license = licenses.mit;
      maintainers = with maintainers; [ makefu ];
    };
  }
  
negative.code:   pname = "pytest-timeout";
    version = "1.3.1";
  
    # remove after version 1.3.1
    patches = [
      (fetchpatch {
        name = "fix-installation-27-3-with-encoding-issue.patch";
        url = "https://bitbucket.org/pytest-dev/pytest-timeout/commits/9de81d3fc57a71a36d418d4aa181c241a7c5350f/raw";
        sha256 = "0g081j6iyc9825f63ssmmi40rkcgk4p9vvhy9g0lqd0gc6xzwa2p";
      })
    ];
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "4b261bec5782b603c98b4bb803484bc96bf1cdcb5480dae0999d21c7e0423a23";
    };
  
    buildInputs = [ pytest ];
    checkInputs = [ pytest pexpect ];
    checkPhase = ''pytest -ra'';
  