zfs-dkms 0.6.5.6-0ubuntu14: zfs kernel module failed to build

[nixomose]

I did the usual apt-get upgrade and got this.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: zfs-dkms 0.6.5.6-0ubuntu14
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
DKMSBuildLog:
 DKMS make.log for zfs-0.6.5.6 for kernel 4.4.0-47-generic (x86_64)
 Tue Nov 15 19:56:59 EST 2016
 make: *** No targets specified and no makefile found. Stop.
DKMSKernelVersion: 4.4.0-47-generic
Date: Tue Nov 15 19:57:03 2016
InstallationDate: Installed on 2014-01-01 (1049 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
PackageVersion: 0.6.5.6-0ubuntu14
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: zfs-linux
Title: zfs-dkms 0.6.5.6-0ubuntu14: zfs kernel module failed to build
UpgradeStatus: Upgraded to xenial on 2016-09-05 (72 days ago)

[Launchpad Janitor (janitor)]

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