-secret=`ruby -e 'print rand(2**512).to_s(36)[0..49]'`
-read -rd $'\000' keepdisk <<EOF; arv keep_disk create --keep-disk "$keepdisk"
+prefix=`arv --format=uuid user current | cut -d- -f1`
+echo "Site prefix is '$prefix'"
+# (Make sure it matches your configured 5-character site prefix.)
+
+read -rd $'\000' keepservice <<EOF; arv keep_service create --keep-service "$keepservice"