anchor.diff:        python37Packages.six
         python37Packages.urllib3
         python37Packages.vobject
  -      Radicale
  +      radicale
         furl
         orderedmultidict
         pyscrypt
  
positive.code:         description = "URL manipulation made simple.";
        };
      };
      etesync = python37.pkgs.buildPythonPackage rec {
          pname = "etesync";
          version = "0.8.1";
  
negative.code:           inherit pname version;
            sha256 = "007zsdn0zv0f80wpyf8fzl446wmv7jr8a0pdp4wj1y61b14f4q0p";
          };
          checkInputs = [ python37Packages.pytest ];
          meta = with pkgs.stdenv.lib; {
            homepage = "https://github.com/etesync/pyetesync";
            license = licenses.lgpl3;
  