anchor.diff:  
     checkInputs = [ mock ];
     buildInputs = [ nettools glibcLocales ];
  -  propagatedBuildInputs = [ autobahn cffi click hkdf pynacl spake2 tqdm ];
  +  propagatedBuildInputs = [ autobahn cffi click hkdf pynacl spake2 tqdm ipaddress humanize pyopenssl service-identity ];
   
     postPatch = ''
       sed -i -e "s|'ifconfig'|'${nettools}/bin/ifconfig'|" src/wormhole/ipaddrs.py
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , nettools
  , glibcLocales
  , autobahn
  
negative.code:     # XXX: disable one test due to warning:
      # setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
      sed -i -e "s|def test_text_subprocess|def skip_test_text_subprocess|" src/wormhole/test/test_scripts.py
    '' + lib.optionalString (pythonAtLeast "3.3") ''
      sed -i -e 's|"ipaddress",||' setup.py
    '';
  
    checkPhase = ''
  