Vagrant only runnable as sudo

Hey folks,

I'm having some issues running vagrant on my system. What's bugging me is that it'll only run as it should when I sudo it, i.e.

Code:

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sudo vagrant init boxster
sudo vagrant up
sudo vagrant ssh
etc.

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Since vagrant is supplied as a Ruby Gem, I figured it might be something to do with that, but couldn't boil it down.

Any ideas are greatly appreciated,
thanks in advance and cheers