I saw that a new version of hs-plugins is out. It now works for ghc-6.4 and utilizes HSX (http://www.cs.chalmers.se/~d00nibro/haskell-src-exts/) It would be nice if the maintainer of the package could update it cause I couldn`t take it very far. Belongs to dev-haskell. Thanks
*** This bug has been marked as a duplicate of 102240 ***
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