Dear all, The Dimensional library has been ported to GHC 6.8.1 (it remains backwards-compatible with GHC 6.6.1, and also with Cabal 1.1.6 I believe). The new version number is 0.7.1. Due to a GHC 6.8.1 bug (#1919) the CGS module will not compile and has been disabled. Thanks, Bjorn Buckwalter http://dimensional.googlecode.com http://hackage.haskell.org/cgi-bin/hackage-scripts/package/dimensional http://hackage.haskell.org/trac/ghc/ticket/1919