[Haskell-cafe] can this be done with stack?

Using stack, but I have a need to build lots of executables. **lots** and new ones all the time .. my application is music playback. I used to have a single executable for playing music, and used it for all compositions. I later found that I needed to do a lot of configuration specific to each composition, and that the most natural language for specifying all the data and functions specific to a composition was Haskell. That means I have a source file for every composition, in the same directory where I store that composition (as a Sibelius file). But a couple things. (1) they aren't in the stack tree, (2) I don't want to add every one of these to a cabal file. What is the best way to approach this goal? D