TL;DR; it's trivial.

Run `docker run --name lambdapy36 -it -v $(shell pwd):/mycode lambci/lambda:build-python3.6 /bin/sh -c "pip install -r /mycode/requirements.txt -t /mycode/vendored/"`

All your packages are now compiled for the lambda env and have been placed in the /mycode/vendored folder. Either move them into the root before deploy or add /var/task/vendored to Lambda's python path by setting PYTHONPATH: "/var/runtime:/var/task/vendored"