Happy Haskell programming on Emacs Features: 1) Completions of keyword, module, class, function, types, language extensions, etc. 2) Flymake with GHC and hlint 3) Inserting code template The "ghc-mod" program written in Haskell is a backend to gather information from GHC and hlint. Elisp libraries including ghc-mod is an extension to haskell-mode. You should put the followings in your "~/.emacs.el": (autoload 'ghc-init "ghc" nil t) (add-hook 'haskell-mode-hook (lambda () (ghc-init))) or (add-hook 'haskell-mode-hook (lambda () (ghc-init) (flymake-mode))) For more information, see: http://www.mew.org/~kazu/proj/ghc-mod/