Your bug report

#63979: SHEPHERD-SERVICE-CANONICAL-NAME assumes a non-empty PROVISION, but such instantiation is allowed

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 63979@debbugs.gnu.org.

-- 
63979: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=63979
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems