Mark,
Did you end up getting your scanning issue resolved? You may have seem my
own scanning-related adventures over on help-guix [0] where I discovered
that adding the udev rules from sane-backends was needed. The service
definition that I used to add them is:
(simple-service 'sane-udev-rules udev-service-type (list sane-backends))
I found that looking at the output of `scanimage -L` from the
sane-backends package (yes there are user-facing tools in there ☺) as both
my user and root helpful.
Best,
Jack
[0] https://lists.gnu.org/archive/html/help-guix/2019-03/msg00071.html
