local ZTUNNEL_DIR
	ZTUNNEL_DIR="$(pwd)/../ztunnel"
    if [[ -d "${ZTUNNEL_DIR}" ]]; then
      BUILD_ZTUNNEL_REPO="${ZTUNNEL_DIR}"
    else
      echo "No directory at ${ZTUNNEL_DIR}"
      return
    fi
  fi
  if [[ "${BUILD_ZTUNNEL_REPO:-}" == "" ]]; then
    return
  fi

  if ! which cargo; then