{ moz_overlay ? import (builtins.fetchTarball
  "https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz")
, pkgs ? import <nixpkgs> { overlays = [ moz_overlay ]; } }:

pkgs.mkShell {
  buildInputs = with pkgs; [
    latest.rustChannels.stable.rust
    openssl
    pkg-config
  ];
}