Hello David,

November 1, 2020 4:35 AM, "David Duke" <duke.j.david@gmail.com> wrote:

> I'm in the process of having to reinstall ghc-8.6.3 in order to use a library (gtk) where the last
> successful build is 8.6.3. I was able to do that on linux. However I'm now trying to repeat this
> under OSX.

I don't use macOS so I can't answer your build question directly, but do you use ghcup ( https://www.haskell.org/ghcup/ ) to manage your GHC versions? It looks like ghcup has been told about 8.6.3 on darwin: https://gitlab.haskell.org/haskell/ghcup/-/blob/8f4705a50eefafd92ceef32094eec7140885b3d5/.download-urls#L99

HTH,

-- Jack