Comment 1 for bug 717879

I don't intend to add special cases for any archive, PPAs or not. However, clearly this is awkward since you want universe from the first archive in the list but want to disregard the fact that it doesn't exist in the second, and there's no way to configure that explicitly in germinate (it would probably be excessively verbose anyway). Perhaps a reasonable solution would be to raise an exception only if one of the specified components doesn't exist in *any* of the specified archives.