I was not able to make Haddock run... Invoking it for a simple hello world example

...

module Main where

main :: IO() main = putStrLn "Hello World"

gives me the following errors:

Warning: module not found: Prelude Warning: Main: the following names could not be resolved: IO Prelude.()

Fail: does not exist Action: openFile Reason: No such file or directory File: /usr/local/lib/haddock-0.4/haddock.css

Sounds like Haddock isn't installed properly. What procedure did you use to build/install it? Cheers, Simon