Building a Kali ISO is easy, fun and rewarding. You can configure virtually every aspect your your custom Kali ISO build, using the Debian live-build scripts. These scripts allow easy building of Live system images by providing a framework that uses a configuration set to automate and customize all aspects of building the image. We have adopted these scripts and use them for official Kali ISO releases.

To read the full document, check our Live Build a Custom Kali ISO article.

If you have any issues with this procedure, please post them in this thread.