[Haskell] Tracking custom dependencies with Cabal

My project contains some template-haskell generated C code. I maintain both make- and cabal-based build systems for this project. While tracking such a dependency in a make-based setting is pretty much trivial, I'm not aware of any "natural" Cabal facilities to accomplish this and now I'm using an ugly hack with compile time updated "extra-library". Am I missing something? How would you solve this problem? Cheers, Kyra