[Haskell-cafe] Monolithic module tool

Maybe a year or so ago, I came across a tool for Haskell that takes a collection of modules, does some name-mangling, and gives a single module that only needs to export main. There were wonderful reductions in the size of the resulting executable, and potentially more optimizations available to GHC. Anyway, I can't find the link now, and I'm wondering if anyone knows of it. Thanks! Chad