Build failing when building kernel manually on equuleus

[debiansid]

Any fix for building 1.2.8 iso with custom patched kernel and local packages?

Build 1.2.8 iso with local packages

I have tried several times, but since the package/linux-kernel/patches/kernel is not for 4.19.195 which is default on 1.2.8. It failed at kernel compiling if I use 4.19.195. If I switch kernel to 4.19.139 which is required by patches. When building iso, script will still download 4.19.195 from repo. How can I add a kernel module which I need for iptables. Thanks.