It is my understanding that in order to "correctly" wrap a team, every contained robot needs to be wrapped and additionally, an extra folder plus JSON file should be generated describing the team composition.
The first step is already happening (with some exceptions, see #3), but the latter seems to be missing. I looked at a .team file from a JAR and it seems to be a relatively straightforward 1:1 translation that's required here. I'll take a look at implementing this later.