zfs-dkms 0.7.9-3ubuntu6: zfs kernel module failed to build

[BertN45]

Happened during an upgrade from Xubuntu 18.04 to Xubuntu 18.10. But ZFS did work OK after upgrade.

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: zfs-dkms 0.7.9-3ubuntu6
ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
Uname: Linux 4.18.0-12-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
DKMSBuildLog:
 DKMS make.log for zfs-0.7.9 for kernel 4.18.0-12-generic (x86_64)
 Wed Dec 5 13:43:02 AST 2018
 make: *** No targets specified and no makefile found. Stop.
DKMSKernelVersion: 4.18.0-12-generic
Date: Wed Dec 5 13:43:04 2018
InstallationDate: Installed on 2018-01-11 (328 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
PackageArchitecture: all
PackageVersion: 0.7.9-3ubuntu6
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.0
SourcePackage: zfs-linux
Title: zfs-dkms 0.7.9-3ubuntu6: zfs kernel module failed to build
UpgradeStatus: Upgraded to cosmic on 2018-12-05 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Colin Ian King (colin-king)]

The ZFS drivers are now provided by the kernel package and so zfs-dkms can be safely removed and will avoid this issue.

[robert Newton (newtonsys-o)]

I have btrfs! why did apt upgrade hold back 180 files when 1765 just upgraded??
Why did Aptitude suggest (and I accepted) that more upgrade?
Why include zfs ;-(

apt remove zfs?? thanks in advance. srn