Comment 3 for bug 468809

Exactly! The --addpkg switch just adds packages from the repositories, which are specified by --mirror. Therefore only debs from official repositories can be added.

Now when I have a package which is not available in any repository (a custom deb), I didn't find a simple way to include it in the built VM, except using one of those workarounds I mentioned. I even don't want to setup an own, local apt repository? I just want to include a filename (or path) in my local filesystem, and have the debs included from there.