We are using Qt Assistant as our help system for a custom application that will run on Ubuntu. In building the .deb package, I need to include a "Requires:" value that makes my package dependent on the Qt Assistant package being installed.

Right now I am using qt4-dev-tools, and it works, but this package is huge because it includes a whole lot of other tools that I don't need at all.

What package do I require to get only Qt Assistant installed?

Also, if you could explain how you found the answer, I'd appreciate it. Poking around the Ubuntu package search isn't very efficient .. are there some apt-get commands that help here?