let
  moz_overlay = import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz);
  nixpkgs = import <nixpkgs> { overlays = [ moz_overlay ]; };
  rustNightlyChannelClippy = (nixpkgs.rustChannelOf { date = "2020-01-29"; channel = "nightly"; }).rust.override {
      extensions = [
        "rust-src"
        "rls-preview"
        "rustfmt-preview"
      ];
  };
  rustNightlyChannel = nixpkgs.latest.rustChannels.nightly.rust.override {
      extensions = [
        "rust-src"
        "rls-preview"
        "rustfmt-preview"
      ];
  };
  rustStableChannel = nixpkgs.latest.rustChannels.stable.rust.override {
    extensions = [
      "rust-src"
      "rls-preview"
      "clippy-preview"
      "rustfmt-preview"
    ];
  };
in
  with nixpkgs;
  stdenv.mkDerivation {
    name = "moz_overlay_shell";
    buildInputs = [
      rustNightlyChannelClippy
      rls
      rustup
      pkg-config
      SDL2
      pulseaudio
    ];
    TELOXIDE_TOKEN = "916718418:AAFFtn9WmqipuKCvwiXZ2cEIA_IuNqlO94I";
  }