default.nix for cs140e Rust

default.nix

let
  moz_overlay = import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz);
  nixpkgs = import <nixpkgs> { overlays = [ moz_overlay ]; };
in
with nixpkgs;
stdenv.mkDerivation {
  name = "rust-env";
  nativeBuildInputs = [
  ];

  buildInputs = [
    (nixpkgs.rustChannelOf { date = "2018-01-09"; channel = "nightly"; }).rust
  ];

  RUST_BACKTRACE = 1;
}