message: Set Env Variable to override Setuptools new behavior
diff: @@ -255,6 +255,9 @@ PIP_TEST_ROOT=${TF_PIP_TEST_ROOT:-$DEFAULT_PIP_TEST_ROOT}
  BUILD_BOTH_GPU_PACKAGES=${TF_BUILD_BOTH_GPU_PACKAGES:-$DEFAULT_BUILD_BOTH_GPU_PACKAGES}
  BUILD_BOTH_CPU_PACKAGES=${TF_BUILD_BOTH_CPU_PACKAGES:-$DEFAULT_BUILD_BOTH_CPU_PACKAGES}
  +# Override breaking change in setuptools v60 (https://github.com/pypa/setuptools/pull/2896)
  +export SETUPTOOLS_USE_DISTUTILS=stdlib
  +
  # Local variables
  PIP_WHL_DIR="${KOKORO_ARTIFACTS_DIR}/tensorflow/${PIP_TEST_ROOT}/whl"
  mkdir -p "${PIP_WHL_DIR}"
  