Hi I have a problem with the CUPS service.
I put the script

(service cups-service-type
(cups-configuration
(web-interface? #t)
(extensions
(list cups-filters hplip))))

and I have put in the 'use-service-module cups' and 'use-package-module
cups'
I upgrade  my GuixSD with sudo -E guix system reconfigure /etc/config
but it's same.