The culprit is that GHCJS isn't released.  This again means that the stack project doesn't want to support it (yet).  This is unfortunate, but the way things are.

(In addition to GHCJS not being released, I'm guessing that there is no FP Complete customer using ghcjs yet)

I wouldn't recommend using nix for this, as when you work with ghcjs, you'll likely need to be on the bleeding edge anyways.  I don't see what issue nix solves in this, but it does add an extra level of complexity.

If you want to use stackage nightly (as lts is a bit stuck at the moment), I can recommend the following which works for me:

resolver: nightly-2016-10-25

compiler: ghcjs-0.2.1.820161025_ghc-8.0.1
compiler-check: match-exact

setup-info:
  ghcjs:
    source:
      ghcjs-0.2.1.820161025_ghc-8.0.1:
          url: http://tolysz.org/ghcjs/untested/ghc-8.0-2016-10-25-nightly-2016-10-25-820161025.tar.gz
          sha1: ca05f23ab6af89803a9fa8ce7241ebdd2eee7dae

Alexander


On Sun, Oct 30, 2016 at 10:01 AM, Zachary Kessin <zkessin@gmail.com> wrote:
I am starting a project that might use ghcjs and it seems to me that if someone's first impression of it is tying stack install and having it take several hours to build everything that is not a very welcoming way to get people to use ghcjs. Why not precompiled binaries?

Also while It has been compiling i have seen a lot of warnings?

Zach

--
Zach Kessin
Twitter: @zkessin
Skype: zachkessin
ᐧ

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