Control: forcemerge 977656 -1 Hello,
0.8.6 does not support Linux 5.10---hence the failures. Right now, the only released version of ZFS that supports Linux 5.10 is 2.0.1, and that is currently packaged in experimental. The Debian ZFS team is still deciding between 0.8.x and 2.0.x for bullseye, but 2.0.x will exist in backports. Best, Antonio