How to deploy dependencies package for Lambda function using CDK?

Hi, the right to do that is to use Lambda Layers: https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html

A layer is a .zip file archive that can contain additional code or data. A layer can 
contain libraries, a custom runtime, data, or configuration files. Layers promote 
code sharing and separation of responsibilities so that you can iterate faster on 
writing business logic.

You may also want to read this post; https://aws.amazon.com/blogs/compute/using-lambda-layers-to-simplify-your-development-process/

It will allow you to cleanly separate your code from its dependencies in terms of deployments, etc.

Best,

Didier