[Haskell-beginners] Haskell -> JavaScript -> nodejs

Hi, I can successfully compile a basic Hello World into JavaScript with ghcjs and run it with nodejs. But what I ultimately need to do is write a nodejs module in Haskell and compile down to JavaScript with ghcjs. I need to be able to require other nodejs modules as well. Could somebody point me in the right direction? E.g. what approach and libraries to use... I have tried a simple thing with jsaddle/lens, but when I try to compile with ghcjs it is not finding the imported modules, even though when compiling with ghc it does find them (they are installed using cabal). Many Thanks Martin