Collaborating on a packaged function

Me and my team are using Serverless Framework to build our lambda functions in python on AWS.
When using python modules that are not available in default for lambda functions (such as numpy),
we create a virtual machine and package all the extras before deployment.

My question is, how can we collaborate on such packaged functions?
(pull the code from git and then deploy function? download the full package from lambda through sls?)

I found a solution that works.
You need to make sure that the lib folder is also pushed into the git, hence make sure it doesn’t show up in the gitignore.txt file that is created when packaging deploying the lambda,