NixOS/nixpkgs — pull request #1663 by chrisfarms (2014-02-02 11:11:37+00:00)
Title: Update virtualbox/guest additions to 4.3.6

Previous guest additions are no longer compatible with current version of virtualbox which makes it a pain to play with NixOs in a vm.... so bump to 4.3.6?

The vboxsf module was not getting loaded when the virtualbox service is enabled, so fixed that.