common.nix

with (import (builtins.fetchGit {
  url = "https://github.com/dmjio/miso";
  ref = "f910593c1a0a6ce1624f41d4e74963370cec958c"; # "refs/tags/1.8";
}) {});

default.nix

let nixpkgs = import <nixpkgs> {};
    pkgs = import ./common.nix;
    dotrace = msg: set: let names = builtins.concatStringsSep "; " (builtins.attrNames packages);
                        in builtins.trace ''${msg} attrs are: ${names} '' set;
    pkgs2 = pkgs // {
      haskell = pkgs.haskell // {
        packages = pkgs.haskell.packages // {
          ghc8107 = pkgs.haskell.packages.ghc8107.extend(hself: hsuper: {
            cabal-install = nixpkgs.cabal-install;
          });
          ghcjs810 = pkgs.haskell.packages.ghcjs810.override {
            overrides = hself: hsuper: {
              memory = pkgs.haskell.lib.dontCheck hsuper.memory;
            };
            }; #// (
            #dotrace "from importing hls.nix" (import ./hackage/hls.nix ({lib = nixpkgs.lib; callPackage = hsuper.callPackage; }) hself)
            #)
        };
      };
    };
    packages =  pkgs2.haskell.packages;
    pkgattr = builtins.concatStringsSep "; " (builtins.attrNames packages);
    latter = builtins.trace ''packages attrs are: ${pkgattr} '' packages;
in {
  pkgs = pkgs2;
  match_rex = latter.ghc8107.callCabal2nix "match-rex" ./. { miso = latter.ghc8107.miso-jsaddle; };
  release = latter.ghcjs810.callCabal2nix "match-rex" ./. {};
}