[Haskell-cafe] downgrading GHC version on a Mac

Matt parsonsmatt at gmail.com
Thu Apr 5 18:13:57 UTC 2018

I do not have a system GHC installed. For tools that need it (eg cabal), I
have an alias `stack-shell` that does `stack exec --no-ghc-package-path
zsh`. You can use that, with a given resolver (that corresponds to the GHC
version you want) to have a shell open with the GHC you want to use
available "globally." I find that this keeps things clean and easy to

Matt Parsons

On Thu, Apr 5, 2018 at 12:06 PM, Dennis Raddle <dennis.raddle at gmail.com>

> I'm on a MacBook Pro. I'm not very familiar with software installation.
> Up until now I've been using Stack for GHC work, and it seems to take care
> of having the right version of GHC.
> Now I'm going to use GHCJS, and I need to have a system GHC installed (I
> believe). At some point in the past I installed the Haskell Platform for
> Mac, and I have GHC 8.01. But I want to downgrade that to 7.10 so that I
> don't have to worry about compatibility with GHCJS.
> How do I go about uninstalling GHC 8 and installing 7.10 in its place? Can
> I use Homebrew?
> D
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