Copyright is always about distribution. So yes, you are allowed to fork, but you are not allowed to distribute the copyrighted content to other people. And with the No Derivatives clause you are also not allowed to change it. You might be able to stay in the gray are by telling everyone “build it yourself”, but nobody would be allowed to package it either.

Well, the summary pasted in the post mentions “VM” about a dozen times

The fact that the initial mission duration was 8 days makes it unlikely this is true, and with multiple cargo missions since then (for example two already this August), it is even more unlikely they wouldn’t have received a new set of clothes by now.

I’d go with symlinks, so both you and software not strictly following standards know where to put and find stuff.

Ah, clearly Fedora then.