Tried to install reactive-0.2 on GHC-6.6, but failed. Building reactive-0.2... src/Data/Reactive.hs:1:13: cannot parse LANGUAGE pragma Is the package for GHC 6.8? Is there an older version (0.0?) for GHC 6.6 that I can play with your example? (Or advise how to hack that file to get it work on 6.6) Thanks, Steve