This was caused by a patch I sent which was applied on master.
Guix error messages could be more natural, as for me the error output I
got seemed just verbose and I decided it was okay to send this in. The
commit has since then be reverted and I will send in an updated patch.
Simpler explanation: a license I added was already inherited by another
loaded module, this caused some "hick up" and make broke (while it did
not break locally on my side).
P.S. I'm not subscribed to bug-guix, so please CC me in any
responses to this thread!
Can you please close this bug (see the message you got from
debbugs.gnu.org with instructions) when it is done.
For me master builds again, so I assume this bug is done?