anchor.diff:      sha256 = "10qsqdjpbc85fykc1vgcs8xwbgn4l2l52c8d83xf1q59pwyn79bw";
     };
   
  -  checkInputs = [ pytest_3 ];
  +  checkInputs = [ pytest ];
   
     # Wrong encoding
     postPatch = ''
       rm tests/test_reading.py
  +    substituteInPlace setup.cfg --replace "[pytest]" "[tool:pytest]"
     '';
     checkPhase =  ''
       # FIXME: test_minimize_dfa fails on python 3.6
  
positive.code: { stdenv, buildPythonPackage, fetchPypi, pytest_3 }:
  
  buildPythonPackage rec {
    pname = "Whoosh";
  
negative.code:     homepage    = https://bitbucket.org/mchaput/whoosh;
      license     = licenses.bsd2;
      maintainers = with maintainers; [ nand0p ];
    };
  }
  