I had trouble figuring out why apt-get update wasn't fetching any of the dep11 files from my repo, even though the files were mentioned in the Release file. Eventually I discovered that it looks for the uncompressed Components and icons files, and then downloads the compressed ones. (It actually downloads .xz, then recompresses as .gz.) So currently I'm having to generate the uncompressed files in a separate step after running asgen.

This is more of a bug in apt than in asgen but since apt is out there like this in Xenial right now, it's probably a good idea to match what it expects.