Building an ISO for CD release of a custom FreeBSD 5.4

Hi, I ported/upgraded our custom FreeBSD (custom kernel, security patches, etc.) from 4.9-stable to 5.4-stable, and have downloaded and built all the ports we need. I want to provide this already-built system for use in our QA lab and by other developers, so I'm attempting to build a bootable

make installworld aborted w/signal 12, single user mode shell also gets signal 12

Is there a way to proceed from here other than to get a binary distribution and re-start? I was trying to upgrade the system from 4.11 to 5.4 following the instructions in the Makefile. Thanks, Jonathan ___ freebsd-questions@freebsd.org mailing list