Set Env Variable to override Setuptools new behavior

PiperOrigin-RevId: 423468055
Change-Id: I5b148103e1372a5eb73570bc77face27dbd5f914

Author: tensorflower-gardener

tensorflow/tools/ci_build/builds/pip_new.sh

@@ -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}"