Add labels to your filesystems.
Change /etc/fstab to use the labels.
Change the kernel command line to use a label for the root disk.
Adding labels to filesystems
Note that the labels apply to partitions, not to disks.

Example in /etc/fstab:
LABEL=BACKUP /media/BACKUP ext2 noauto,users,noatime 0 0

That entry is not in the list till it will be mounted without the plugin.

It should be easy to fix in devices.c, line #406/407.

        has_valid_mount_device =
                        g_str_has_prefix(pfstab->fs_spec, "/dev/") ||  g_str_has_prefix(pfstab->fs_spec, "UUID=") || g_str_has_prefix(pfstab->fs_spec, "LABEL=");