Good advice for today, but the Haskell Platform got started in 2008-2009. This book is from 2004.

The 2nd edition (2012) fixes this and recommends ghci -- http://www.amazon.com/Haskell-Programming-Second-Edition-Com...

Worth the purchase!

The book in the link is almost 10 years old. Perhaps you could mention what you think is a better starting point rather than Hugs?