Your bug report

#49781: Successful build on ci.guix not available as substitute

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 49781@debbugs.gnu.org.

-- 
49781: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=49781
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems