zfs-dkms 0.6.5.6-0ubuntu18: zfs kernel module failed to build

[rebroad]

just installed 16.04 LTS (downloaded today) and tried to install zfs - no other packages installed yet.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: zfs-dkms 0.6.5.6-0ubuntu18
ProcVersionSignature: Ubuntu 4.10.0-35.39~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-35-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
DKMSBuildLog:
 DKMS make.log for zfs-0.6.5.6 for kernel 4.10.0-35-generic (x86_64)
 Thu 5 Oct 22:36:13 BST 2017
 make: *** No targets specified and no makefile found. Stop.
DKMSKernelVersion: 4.10.0-35-generic
Date: Thu Oct 5 22:36:20 2017
InstallationDate: Installed on 2017-10-05 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageVersion: 0.6.5.6-0ubuntu18
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: zfs-linux
Title: zfs-dkms 0.6.5.6-0ubuntu18: zfs kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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