Packaging package not being bundled with deploy-ng build

Steps to reproduce (python 3.7 on Ubuntu 18.04):

git clone
git checkout effects
pip install -r requirements.txt
python build_apps

This gives the following error:

ImportError: The 'packaging' package is required; normally this is bundled with this package so if you get this warning, consult the packager of your distribution.

This is caused by trying to import which uses pkg_resources to load some stuff. Unfortunately packaging doesn’t seem to get bundled with the build. Is this a bug or am I missing something? I’ve tried adding packaging to include_modules in my