Since the site for signing up to haddock mailing list seems to be down ( http://projects.haskell.org/cgi-bin/mailman/listinfo/haddock) I thought I would post this here Haddock fails to parse (and therefore closes prematurely) when generating documentation for the Hamlet package found here ( http://hackage.haskell.org/package/hamlet). This furthermore prevents the hamlet from being built on archlinux using cabal2arch/AUR/bauerbill The error when creating the documentation is Warning: Text.Hamlet.Quasi: We do not support associated types in instances yet. These instances are affected: Text.Hamlet.Quasi.HamletValue (Text.Hamlet.Quasi.Hamlet url), Text.Hamlet.Quasi.HamletValue Text.Blaze.Internal.Html haddock coverage for dist/build/tmp17309/Text/Hamlet/Quasi.hs: 9/14 64% dist/build/tmp17309/Text/Cassius.hs:340:23: parse error on input `AbsoluteUnit' Aborting... On the previous haskell-platform this did not happen Thanks