[Haskell-cafe] can't find in hayoo

I need the trick to get from ByteString -> [GHC.Word.Word8] and Hayoo is not helping. Super simple I expected. I haven't even tried to compile it yet. I am just trying to read in the bytes and encode with base64: import Codec.Binary.Base64 import Data.ByteString import System.Directory import System.Environment main :: do args <- getArgs bFileExist <- System.Directory.doesFileExist (args !! 0) let bytedata = --ByteString -> [GHC.Word.Word8] if bFileExist then putStrLn $ Codec.Binary.Base64.encode bytedata else putStrlLn ("File does not exist: " ++ (args !! 0)) return ()