How do I compile spl-dkms for linux-image-generic-4.13

This happened during an update:

I have spl-dkms (0.6.5.6-0ubuntu4) installed on xenial. The update pulled in linux-image-4.13.0.32-generic and the compilation of spl-dkms for that kernel failed. I've pasted the output of the compilation below.

To me, this looks like https://github.com/zfsonlinux/spl/issues/618, where it says that 0.6.5.6 won't work for 4.13 kernels.

I've currently downgraded the kernel and put linux-image-generic-hwe-16.04 on hold. What else can I do?

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Kernel preparation unnecessary for this kernel. Skipping...

Running the pre_build script:
checking for gawk... gawk
checking metadata... META file
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether make supports nested variables... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking how to print strings... printf
checking for a sed that does not truncate output... /bin/sed
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for fgrep... /bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for a working dd... /bin/dd
checking how to truncate binary pipes... /bin/dd bs=4096 count=1
checking for mt... mt
checking if mt is a manifest tool... no
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking spl author... OpenZFS on Linux
checking spl license... GPL
checking linux distribution... ubuntu
checking default package type... deb
checking whether rpm is available... no
checking whether rpmbuild is available... no
checking whether spec files are available... yes (rpm/generic/*.spec.in)
checking whether dpkg is available... yes (1.18.4)
checking whether dpkg-buildpackage is available... yes (1.18.4.)
checking whether alien is available... no
checking spl config... kernel
checking kernel source directory... /lib/modules/4.13.0-26-generic/build
checking kernel build directory... /lib/modules/4.13.0-26-generic/build
checking kernel source version... 4.13.0-26-generic
checking kernel file name for module symbols... Module.symvers
checking whether debugging is enabled... no
checking whether basic kmem accounting is enabled... no
checking whether detailed kmem tracking is enabled... no
checking whether modules can be built... yes
checking whether atomic types use spinlocks... no
checking whether kernel defines atomic64_t... yes
checking whether old 2-argument shrinker exists... no
checking whether old 3-argument shrinker exists... no
checking whether new 2-argument shrinker exists... no
checking whether ->count_objects callback exists... yes
checking whether struct ctl_table has ctl_name... no
checking whether PDE_DATA() is available... yes
checking whether set_fs_pwd() requires const struct path *... yes
checking whether vfs_unlink() wants 2 args... no
checking whether vfs_unlink() wants 3 args... yes
checking whether vfs_rename() wants 4 args... no
checking whether vfs_rename() wants 5 args... no
checking whether vfs_rename() wants 6 args... yes
checking whether vfs_fsync() wants 2 args... yes
checking whether truncate_range() inode operation is available... no
checking whether struct fs_struct uses spinlock_t... yes
checking whether kuid_t/kgid_t is available... yes; mandatory
checking whether __put_task_struct() is available... no
checking whether fops->fallocate() exists... yes
checking whether iops->fallocate() exists... no
checking whether fops->fallocate() exists... no
checking whether CONFIG_ZLIB_INFLATE is defined... yes
checking whether CONFIG_ZLIB_DEFLATE is defined... yes
checking whether zlib_deflate_workspacesize() wants 2 args... yes
checking whether struct shrink_control exists... yes
checking whether struct rw_semaphore member wait_lock is raw... yes
checking whether header linux/sched/rt.h exists... yes
checking whether vfs_getattr() wants... configure: error: unknown

Building module:
cleaning build area....(bad exit status: 2)
make KERNELRELEASE=4.13.0-26-generic....(bad exit status: 2)
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/spl-dkms.0.crash'
Error! Bad return status for module build on kernel: 4.13.0-26-generic (x86_64)
Consult /var/lib/dkms/spl/0.6.5.6/build/make.log for more information.