I'm currently in the process of packaging my submission for the Ubuntu App Showdown. I read in the rules that the package may not have dependencies that are not in the Ubuntu repository. But what exactly does that mean? May I upload a package that depends on another package in the Universe repository? And if so, how to I submit it to make the build-service happy? And if this is not allowed, how should I go about this? Include the library directly in my package?