Installing ghc-mod

The ghc-mod program allows some editors to do some extra things with Haskell source code. Here’s how to install it.

• First, you need to need to have installed the Haskell Platform.

• The cabal program is a package manager for Haskell. You need to update its list of packages.

  1	cabal update

• The ghc-mod program depends on other things with depend on you having a program called happy, so we need to install that first.

  1	cabal install happy

• That program will be installed in ~/.cabal/bin, so make sure you update your $PATH environment to point to this.

• Finally, you should be able to install ghc-mod:

  1	cabal install ghc-mod