Out of interest: Why would you compile the compiler from the release
sources? After all, it's the binary release bundle and not the
development build. Also there are tools like digger that automate
everything for you...
I understand that sometimes it can be nice to do that, but imho you are
making a big deal out of this, while it's not really one in practice as
you can simply fetch the source from GitHub.
Also there is no CI for the release builds and there's only one person
who can build them (Martin) as it requires virtual machines for all
supported OSes. Martin does an amazing job, but there's only so much one
person can do...
every sentence in this answer is perfect. and the whole thing perfectly
illustrates the reasons for my hardfork.