package zfs-dkms 0.8.3-1ubuntu12 failed to install/upgrade: installed zfs-dkms package post-installation script subprocess returned error exit status 10

[martyfelker]

Ubuntu 20.04 ZFS filesystem

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: zfs-dkms 0.8.3-1ubuntu12
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Apr 16 04:50:05 2020
ErrorMessage: installed zfs-dkms package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2020-04-16 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200220)
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2
SourcePackage: zfs-linux
Title: package zfs-dkms 0.8.3-1ubuntu12 failed to install/upgrade: installed zfs-dkms package post-installation script subprocess returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)

[Colin Ian King (colin-king)]

For Ubuntu Focal the dkms package is not required as the driver is supplied in the kernel package. I recommend removing zfs-dkms to avoid this happening in the future.