However, when doing a dockerless deploy (which is AWESOME thank you!) it creates no such file. I can't figure out exactly what I'm supposed to do.
The libraries concept doesn't apply because the managed VM has full access to the system. If the library is installed, it can be imported.
FROM gcr.io/google_appengine/python-compat
RUN apt-get update && apt-get install -y python-imaging
ADD . /app