In the online version of Real world Haskell, there's a problem with examples in ghci when the module Database.HDBC.Sqlite3 is imported. It goes on like this for all of chapter 21 and 22. Example : ( note: this is not me trying to reproduce the examples, it's an actual copy & paste from the site url http://book.realworldhaskell.org/read/using-databases.html ) ghci> :module Database.HDBC Database.HDBC.Sqlite3 Could not find module `Database.HDBC.Sqlite3': Use -v to see a list of the files searched for. ghci> conn <- connectSqlite3 "test1.db" <interactive>:1:8: Not in scope: `connectSqlite3' ghci> :type conn <interactive>:1:0: Not in scope: `conn' ghci> disconnect conn <interactive>:1:0: Not in scope: `disconnect' <interactive>:1:11: Not in scope: `conn'