Ne fais pas "import Parsec". A la place, fais import Text.ParserCombinators.Parsec import Text.ParserCombinators.Parsec.Char import Text.ParserCombinators.Parsec.Combinator Pour voir si ca marche: david@pcdavid:~/code/edimail$ ghci GHCi, version 6.12.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Prelude> import Parsec <no location info>: Could not find module `Parsec': it is not a module in the current program, or in any known package. Prelude> import Text.ParserCombinators.Parsec Prelude Text.ParserCombinators.Parsec> Pour compiler, ghc --make -O2 Tatata.hs David.