Hey all, I just created a buildpack to deploy Haskell apps to Heroku. If you use Yesod or Snap or whatever give it a try. It uses GHC 7.6.3 and Cabal 1.18 so it should support all the modern goodies you like to use. https://github.com/begriffs/heroku-buildpack-ghc Also some people have reported an issue with cabal-install choosing the wrong versions of packages. Anyone run into this kind of thing before? https://github.com/begriffs/heroku-buildpack-ghc/issues/7 Regards, Joe Nelson