Package: zfsutils Version: 9.2-2 Severity: critical This version of zfsutils implements ZFS v5000 (i.e. feature-based versioning), which GRUB prior to 2.00-21 doesn't support. As a result, running "zpool upgrade" with this version of zfsutils may render system unbootable. It should have a "Breaks: grub-common (<< 2.00-21~)" to prevent this. -- Robert Millan