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