> thus creating a conflict with the license that effectively prohibits
changes that are not "substantial"
This is my understanding as well.
> Isn't everything in Trisquel's repository required to be "buildable" with
only free software?
Yes, this is a problem too.
> [VRMS] is useless on Trisquel
Maybe not after all. It does not do what many people assume it does, but it
was useful here. Debian is very thorough when it comes to licensing, so if
they have a Trisquel package in contrib or non-free it is worth at least
checking to see what the reason is.