Excuse the very late reply...
The cause of this bug is that GNOME can't find all the cursor icons
it needs. A workaround is to force use of the Adwaita cursor theme,
by creating the following symlink in your home directory:
${HOME}/.icons/default/cursors ->
/run/current-system/profile/share/icons/Adwaita/cursors/
This should solve the problem for you.
To close this bug, Guix should automatically take care of this cursor
business, but I don't know enough about desktop standards etc to fix
this myself at the moment.
Sincerely,
Thomas
