VirtualBox 1.3.4 installer, built Sun Feb 11 18:00:03 CET 2007.

Testing system setup...
System setup appears correct.

Installing VirtualBox to /opt/innotek/VirtualBox

Output from the module build process (the Linux kernel build system) follows:

Info: using /lib/modules/2.6.18.2-34-default/build/include as the include directory of your Linux kernel. If this is not correct, specify KERN_INCL=<directory> and run Make again.
Makefile:93: *** Error: unable to find the include directory for your current Linux kernel. Specify ERN_INCL=<directory> and run Make again..  Stop.