package virtualbox-ose-dkms 3.1.6-dfsg-2ubuntu2 failed to install/upgrade: virtualbox-ose kernel module failed to build

On mythbuntu 10.04, virtualbox-ose-dkms doesn't install because the kernel module doesn't build:

var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c: In function ‘VBoxDrvLinuxInit’:
/var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c:443: error: ‘nmi_watchdog’ undeclared (first use in this function)
/var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c:443: error: (Each undeclared identifier is reported only once
/var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c:443: error: for each function it appears in.)
/var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c:443: error: ‘NMI_IO_APIC’ undeclared (first use in this function)
/var/lib/dkms/virtualbox-ose/3.1.6/build/vboxdrv/linux/SUPDrv-linux.c:457: error: ‘nmi_active’ undeclared (first use

I'm not running the usual kernel for 10.04. I'm running 2.6.38, because lirc wasn't working with the standard kernel.

However, I suspect that the fact that I'm using a non-default kernel is the reason that the virtualbox kernel modules
won't build.

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: virtualbox-ose-dkms 3.1.6-dfsg-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-13.53~lucid1-generic-pae 2.6.38.8
Uname: Linux 2.6.38-13-generic-pae i686
Architecture: i386
Date: Mon Dec 26 13:04:16 2011
ErrorMessage: virtualbox-ose kernel module failed to build
InstallationMedia: Mythbuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
PackageArchitecture: all
PackageVersion: 3.1.6-dfsg-2ubuntu2
SourcePackage: virtualbox-ose
Title: package virtualbox-ose-dkms 3.1.6-dfsg-2ubuntu2 failed to install/upgrade: virtualbox-ose kernel module failed to build
VirtualBoxOse.ModInfo: