these 3 derivations will be built:
  /nix/store/zz9nzvpz5pqmjinnrffdvh8x6zxw8wid-clan-cli-source.drv
  /nix/store/2l4122r2p37zc901pxxi6mpsbvqrj9d2-clan-cli.drv
  /nix/store/svamlfqqmiialgf4i173rqkhg2zx8y8a-nix-shell.drv