/tmp/vbox.0/Makefile.include.header:112: *** Error: unable to find the sources of your current Linux kernel. Specify KERN_DIR=<directory> and run Make again. Stop.
Creating user for the Guest Additions.
Creating udev rule for the Guest Additions kernel module.
cjinle@debian:/mnt$ sudo apt-get install kernel-headers kernel-devel
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package kernel-headers
E: Unable to locate package kernel-devel