For GHCJS: If you’re using GHCup, you need to install the cross channel. You can see the available ghcjs builds. Make sure you get the matching Emscripten version. Then you can invoke cabal-install with the new compiler.
For GHCJS: If you’re using GHCup, you need to install the cross channel. You can see the available ghcjs builds. Make sure you get the matching Emscripten version. Then you can invoke cabal-install with the new compiler.