Building from source for Trixie

Thanks Rod, I managed to build a deb in a bookworm chroot but it won't install on trixie because linuxcnc requires python3.11 and trixie uses python3.13. I also tried installing the deb from buildbot2 but same result. Looks like I have no option but to reinstall bookworm. Major PITA.
On that note, I recall you posted the 6.3.0-rt11-linuxcnc kernel somewhere, but I can no longer find it. Could you tell me where that is? Thanks again.
Jim
 

Following this with interest (I had the exact same problem) - my goal was rebuilding the mot2-eth driver. Will review all the advice here when I've had more coffee but PITA if we can't build from a Trixie installation.