AFAIK if you rebuild a package you have to change the version number/label so that apt et al. will consider it newer than the package version currently in the repository.
Of course, if a new version comes up, then the version number might be higher than what you have, so apt will want to replace it -- but anyway you will (probably) also want to rebuild your custom package based on the latest version..
It's a nice idea! Yes, I want to know when the new version comes out, so that I can build my own customized one.
Thank you very much!!
EDIT: BTW as for Gentoo, I am fed up with their policy that they are providing both openrc and systemd options and Gentoo has a lot of web pages describing encryption and uefi, some of which are too old. And some packages are old. So I've abandoned.