with import <nixpkgs> {}; {
  env = stdenv.mkDerivation {
    name = "env";
    buildInputs = with pkgs; [
      stack
      psc-package
      (callPackage ./nix/purescript.nix {})
      nodePackages.nodemon
      tmux
      tmuxinator
      nodejs-8_x
    ];
    shellHook = ''
      export PATH=node_modules/.bin:$PATH;
    '';
  };
}