Ok, found it, there's an unlisted dependency on pahole
The fix is apt install pahole
- Bug#1098779: zfs-dkms: zfs/2.3.0 fails to build with k... jfp
- Bug#1098779: Acknowledgement (zfs-dkms: zfs/2.3.0... Jean-Francois Pirus
- Bug#1098779: Acknowledgement (zfs-dkms: zfs/2.3.0... Jean-Francois Pirus
- Bug#1098779: Consider adding pahole to Depend... Shengqi Chen
- Bug#1098779: Consider adding pahole to De... Shengqi Chen
