anchor.diff:        # core
         twisted
         jinja2
  +      msgpack
         zope_interface
         sqlalchemy
         alembic
  
positive.code: { stdenv, lib, buildPythonPackage, fetchPypi, makeWrapper, isPy3k
  , python, twisted, jinja2, zope_interface, sqlalchemy, alembic, python-dateutil
  , txaio, autobahn, pyjwt, pyyaml, unidiff, treq, txrequests, pypugjs, boto3
  , moto, mock, lz4, setuptoolsTrial, isort, pylint, flake8, buildbot-worker
  , buildbot-pkg, buildbot-plugins, parameterized, git, openssh, glibcLocales
  , nixosTests
  }:
  
  
negative.code:       autobahn
        pyjwt
        pyyaml
      ]
        # tls
        ++ twisted.extras-require.tls;
  