# Forcefully install guest additions from backports so we are
# compatible with VirtualBox 4.x series
apt-get install -y -t squeeze-backports virtualbox-ose-guest-dkms \
+ virtualbox-ose-guest-utils virtualbox-ose-guest-x11 \
>| /var/log/initial_setup-dkms.log 2>&1
# to get all the rest stuff in recommends