anchor.diff:      install -Dm644 docs/wormhole.1 $out/share/man/man1/wormhole.1
     '';
   
  -  # zope.interface issue
  -  doCheck = !isPy27;
  -  preCheck = ''
  +  checkPhase = ''
       export PATH=$out/bin:$PATH
       export LANG="en_US.UTF-8"
       export LC_ALL="en_US.UTF-8"
  
positive.code: , humanize
  , txtorcon
  , nettools
  , glibcLocales
  , mock
  , magic-wormhole-transit-relay
  , magic-wormhole-mailbox-server
  
negative.code:     sha256 = "0q41j99718y7m95zg1vaybnsp31lp6lhyqkbv4yqz5ys6jixh3qv";
    };
  
    propagatedBuildInputs = [
      spake2
      pynacl
      six
      attrs
      twisted
      autobahn
      automat
      hkdf
      tqdm
      click
      humanize
      txtorcon
    ] ++ autobahn.extras-require.twisted
    ++ twisted.extras-require.tls;
  
    checkInputs = [
      mock
      magic-wormhole-transit-relay
      magic-wormhole-mailbox-server
      twisted
    ];
  
    postPatch = lib.optionalString stdenv.isLinux ''
      sed -i -e "s|'ifconfig'|'${nettools}/bin/ifconfig'|" src/wormhole/ipaddrs.py
  