Package: virtualbox
Pin: release a=unstable
Pin-Priority: 400

Package: virtualbox-qt
Pin: release a=unstable
Pin-Priority: 400

Package: virtualbox-dkms
Pin: release a=unstable
Pin-Priority: 400

Package: virtualbox-guest-x11
Pin: release a=unstable
Pin-Priority: 400

Package: virtualbox-guest-utils
Pin: release a=unstable
Pin-Priority: 400