Code review comment for lp:~javier.collado/utah/bug1042895

1. I think at one point I was trying to use dpkg-architecture to grab the arch, but we get that from uname now, so I don't think dpkg-dev is needed. A quick look through the sources shows us only using the dpkg command itself, and not any of the dpkg-* stuff in dpkg-dev, so I'm going to go ahead and merge without that. Maybe we can get those jobs working today!