According to a rather upset person on reddit, bootstrap has been broken for years, and I don't think we have the capability to test this platform even if we want to, since it's a proprietary platform that only runs on hardware that is increasingly rare.
I remember ages ago being able to run a whole SCO environment inside of a chroot on NetBSD. I've never tried OSF/1 on NetBSD/alpha, but if someone has Tru64 files, I'll give it a try.
John