For a recent project I did: cabal init stack init stack build Then I wanted a newer version of persistent, so I opened up my stack.yaml file and a

For a recent project I did: cabal init stack init stack build Then I wanted a newer version of persistent, so I opened up my stack.yaml file and added persistent 2.2 to the extra-deps section: extra-deps: - persistent-2.2 Then I was wondering how to make emacs haskell-mode work with it, and I saw this[0] in the stack repo: ((haskell-mode . ((haskell-indent-spaces . 4) (hindent-style . "johan-tibell") (haskell-process-type . ghci) (haskell-process-path-ghci . "stack") (haskell-process-args-ghci . ("ghci"))))) Now everything is working flawlessly and very fast. As a bonus Haskell-mode works correctly for projects I haven't moved to/tested with stack yet. 0: https://github.com/commercialhaskell/stack/blob/master/.dir-locals.el https://github.com/commercialhaskell/stack/blob/master/.dir-...