[Haskell-cafe] Location Of Prelude.hs

Hi, I was reading the book "The Haskell Road to Logic, Math and Programming" and it refers to /usr/lib/hugs/libraries/Hugs/ as the probable location for Prelude.hs. I am currently using Elementary OS Luna (based of Ubuntu 12.04) and could not file the file at the specified location. Can anyone please tell me where to find it? _____________________ Yours Truly, Debdut Karmakar