How does linux-headers get packaged?

[Joel Fernandes]

Hi,
After much digging I could find the recipe for Ubuntu's linux-headers
packages (linux-headers-4.4.0-83 on Xenial) uses.

I believe these headers are not the same ones that come from 'make
headers_install' in the kernel sources, but are specially packaged
version of the ever-changing kernel API and used for kernel module
building.

Could anyone point me to the recipe/scripts used for this?

thanks a lot!

-Joel