How do I associate a Vagrant project directory with an existing VirtualBox VM?

Question

Somehow my Vagrant project has disassociated itself from its VirtualBox VM, so that when I vagrant up Vagrant will import the base-box and create a new virtual

Answer 1

In Vagrant 1.9.1:

I had a VM in Virtual Box named 'Ubuntu 16.04.1' so I packaged it as a vagrant box with:

vagrant package --base "Ubuntu 16.04.1"

responds with...

==> Ubuntu 16.04.1: Exporting VM...
==> Ubuntu 16.04.1: Compressing package to: blah blah/package.box