Building library for moss-0.2.0.0..
[1 of 2] Compiling Paths_moss       ( dist/build/autogen/Paths_moss.hs, dist/build/Paths_moss.o, dist/build/Paths_moss.dyn_o )
[2 of 2] Compiling Stanford.Moss    ( src/Stanford/Moss.hs, dist/build/Stanford/Moss.o, dist/build/Stanford/Moss.dyn_o )

src/Stanford/Moss.hs:202:5: error:
    Variable not in scope:
      forM_
        :: [(String, FilePath)]
           -> ((String, FilePath) -> Moss ()) -> StateT MossSt IO a0
    |
202 |     forM_ fs $ \(dn,fn) ->
    |     ^^^^^