I'm pleased to announce that GHCJS support for Haskell-NG has landed on master, using the recent GHC 7.10 release. Thanks again to Ryan Trinkle for laying the groundwork, Luite Stegeman for making GHCJS, and Peter Simons for reviewing my work and filing off the rough edges. https://github.com/NixOS/nixpkgs/pull/6786 Cheers, -Charles