..
..
Building the Virtualbox Guest Additions kernel modules             [FAILED]
(Your system does not seem to be set up to build kernel modules.
Look at  /var/log/vboxadd-install.log to find out what went wrong)
..

.. .. Building the Virtualbox Guest Additions kernel modules [FAILED] (Your system does not seem to be set up to build kernel modules. Look at /var/log/vboxadd-install.log to find out what went wrong) ..

Makefile:23: *** Error: Unable to find the sources of your current Linux kernel. Specify KERN_DIR=<directory> and run MAKE again.. Stop.

Makefile:23: *** Error: Unable to find the sources of your current Linux kernel. Specify KERN_DIR=<directory> and run MAKE again.. Stop.