Since we got several reports of this on #guix, I reverted the following
commits, tested by reconfiguring and rebooting my GuixSD system, and
pushed the reversions:

5ace0919c Revert "gnu: guile-lib: Switch to Guile 2.2."
6b820ef15 Revert "gnu: guile-rsvg: Update to commit 05c6a2fd."
5e1f9b304 Revert "gnu: guile-gnome: Update to 2.16.5."
f3bb868a7 Revert "gnu: guile-cairo: Switch to Guile 2.2."