anchor.diff:      sha256 = "4b2acd6802a04b59e306d0a6ccf37701d24376f4dc044bbbafba3afdf9d3389a";
     };
   
  +  patches = [
  +    (fetchpatch {
  +      name = "Support-SQLAlchemy-1.4x.patch";
  +      url = "https://github.com/pecan/pecan/commit/a520bd544c0b02a02dbf692b8d6e2f7a503ee6d4.patch";
  +      sha256 = "sha256-QCHRjwnpy8ndCvcuyE5Y65BybKYthJXDySUtmpJD8gY=";
  +    })
  +  ];
  +
     propagatedBuildInputs = [
       logutils
       Mako
  
positive.code:   ];
  
    meta = with lib; {
      description = "Pecan";
      homepage = "http://www.pecanpy.org/";
      changelog = "https://pecan.readthedocs.io/en/latest/changes.html";
    };
  }
  
negative.code: { lib
  , fetchPypi
  , fetchpatch
  , buildPythonPackage
  , isPy27
  # Python deps
  