You will need cabal and the latest haskell (I'm on 7.8.3).
- Install Haskell then Cabal with brew or by other means
- Run these 4 lines to get elm setup locally.
cabal update cabal install cabal-install cabal install -j elm-compiler-0.14 elm-package-0.2 elm-make-0.1 cabal install -j elm-repl-0.4 elm-reactor-0.2.0.1