let
  pkgs = import <nixpkgs> {};
in
  pkgs.stdenv.mkDerivation {
    name = "hello";
    builder = "${pkgs.bash}/bin/bash";
    args = [ ./hello_builder.sh ];
    inherit (pkgs) gnutar gzip gnumake coreutils gawk gnused gnugrep;
    gcc = pkgs.clang;
    bintools = pkgs.clang.bintools.bintools_bin;
    src = ./hello-2.12.1.tar.gz;
    system = builtins.currentSystem;
  }