NixOS/nixpkgs — pull request #5300 by ambrop72 (2014-12-11 22:43:16+00:00)
Title: virtualbox: Allow disabling the network interface.

The current nixos module for VirtualBox unconditionally configures a vboxnet0
network interface at boot. This may be undesired, especially when the user wants
to manage network interfaces in a centralized manner.