[Haskell-cafe] Problem building encoding-0.6.0: missing Data.CharMap.Builder

Hi, I am trying to install the encoding-0.6.0 package, but it complains that that package "Data.CharMap.Builder" is missing. I could not find any reference to that package anywhere on the web. Does anyone know where I can find it or a workaround? Thanks, João Rafael

cabal install encoding

Resolving dependencies... /tmp/encoding-0.6.08632/encoding-0.6.0/Data/Encoding/Preprocessor/XMLMappingBuilder.hs:11:7: Could not find module `Data.CharMap.Builder': Use -v to see a list of the files searched for. cabal: Error: some packages failed to install: encoding-0.6.0 failed during the configure step. The exception was: exit: ExitFailure 1