Comment 4 for bug 1864252

After the dropping of snap-tool, Ubuntu desktop ISOs are failing to build:

error: cannot validate seed:
- cannot use snap "gnome-3-28-1804": base "core18" is missing
- cannot use snap "gnome-calculator": base "core18" is missing
- cannot use snap "gnome-characters": base "core18" is missing
- cannot use snap "gnome-logs": base "core18" is missing
- cannot use snap "gtk-common-themes": base "core18" is missing

https://launchpadlibrarian.net/466333748/buildlog_ubuntu_focal_amd64_ubuntu_BUILDING.txt.gz

Ah, OK:

$ ./snap-tool info gnome-logs | egrep '^base:'
$ base: core18
$ snap info gnome-logs | egrep '^base:'
$

but there is:

$ snap info --verbose gnome-logs | egrep '^base:'
$ base: core18

so I think we just need to add --verbose.