Позивтив, грубо говоря, не нужен. Это убунтовское. (at@ in devel@) ...
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ID Status▲ Resolution Sev Product Comp Assignee▲ Reporter Summary
32136 CLOS WORK enh Sisyphus zfs-util nobody imz bash4 is available to be used for build (with BASHOPTS=extglob, too)

File a new bug in the "zfs-utils" component of the "Sisyphus" product