Dear fellow Haskellers, last weak my Linux machine broke down and refused to start again. I bought a new one and installed a fresh new KDE/Linux distribution (Mint/Ubuntu) and it looks and feels awesome. I also installed the Haskell platform via the default GUI installer (mintInstall). But when I try to run my recovered Haskell modules again, strange things happen. First of all, I have a module that has a line import System and that used to be fine. But now, when I try to load the module in a ghci session, I get a complaint: Could not find module 'System' It is a member of the hidden package 'haskell98-2.0.0.1' ... The same happens if I do a Prelude> :m System What is going on? Secondly, I have another module that has a data type definition like this data (Show n, Show v, Ord n, Ord v) => Automaton n v = Automaton { nameSet :: Set.Set n, valueSet :: Set.Set v, .... } deriving (Show, Eq, Ord) and that used to work fine, too. But now, I get the complaint Illegal datatype context (use -XDatatypeContexts): (Show n, Show v, Ord n, Ord v) => But when I follow the advice and start the module file with a {-# LANGUAGE DatatypeContexts ... #-} I got the opposite complaint: Warning: -XDatatypeContexts is depracated: It was widely considered a misfeature, and has been removed from the Haskell language. How can I clean this up? Cheers, Tom