let
  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz";
  pkgs = import nixpkgs { config = {}; overlays = []; };
in

pkgs.mkShell {

  packages = with pkgs; [
    bash
    gcc
    rustup
    openssl
  ];

  shellHook = ''
    echo $TMPDIR;
    rustup default nightly;
    rustup target add x86_64-unknown-none;
  '';

}