anchor.diff: -{ stdenv, buildPythonPackage, fetchPypi
  +{ lib, buildPythonPackage, fetchPypi
   , setuptools_scm, pathpy, nbconvert
   , pytest }:
   
  
positive.code:     sha256 = "b8a9bdcfa4b705d72b55b218658bc9403c157db7b57a14158253c98d03ab713d";
    };
  
    # Python 3.7 compatibility
    # See https://github.com/zimmermanncode/zetup/pull/1
    postPatch = ''
      substituteInPlace zetup/zetup_config.py \
        --replace "'3.6']" "'3.6', '3.7']"
    '';
  
    checkPhase = ''
  
negative.code:   checkInputs = [ pytest pathpy nbconvert ];
    propagatedBuildInputs = [ setuptools_scm ];
  
    meta = with lib; {
      description = "Zimmermann's Extensible Tools for Unified Project setups";
      homepage = "https://github.com/zimmermanncode/zetup";
      license = licenses.gpl3Plus;
      platforms = platforms.unix;
    };
  