Comment # 1 on bug 1062967 from Adrian Schr�ter

You found the only not building one ....

I did a workaround in that image for now, but the real problem is that the

 virtualbox-guest-kmp-default

package only accepts kernel-default, but not kernel-default-base. Therefore the
smaller -base package can't be used.

Given that this kernel module is to be used esp. in such VMs it makes sense to
me to change that ....