How to build live image from custom compiled kernel? (Live-build)

I want to create a final infrastructure to boot a PXE custom kernel image, but through the process I'm stuck creating a middle "live" CD ISO using a previously compiled custom kernel image with the live-build tool. I don't know how/where to specifiy the lb config/live build tool to use my own kernel deb package instead the default amd64-kernel flavour. I think that I have to use the --linux-packages parameter, but I don't really understand how. I can't find any kind of info or example. I have read all the man pages and so on, but I'm stuck. My current auto/lb config: *lb config no auto \ --architectures amd64 \ --distribution stretch \ --system live \ --chroot-filesystem squashfs \ --apt-recommends false \ --apt-indices none \ --memtest none \ --debian-installer false \ --interactive shell \ --bootloaders syslinux \ --bootappend-live "boot=live components hostname=test username=test sudo" \ "${@}"* How can I create a live image with custom compiled kernel?