Your bug report

#30100: core-updates: GHC / Haskell fails to build

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 30100@debbugs.gnu.org.

-- 
30100: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=30100
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems