message: Fix ImportError: cannot import name 'dense_features'.
  This module was added to tf-estimator-nightly. Change the nightly build to depend on tf-estimator-nightly instead of tensorflow-estimator.
diff: @@ -45,10 +45,15 @@ bazel build --config=opt \
  --crosstool_top=//third_party/toolchains/preconfig/ubuntu16.04/gcc7_manylinux2010-nvcc-cuda10.1:toolchain \
  tensorflow/tools/pip_package:build_pip_package
  +# Set TF nightly flag so we get the proper version of estimator
  +if [[ "$IS_NIGHTLY" == 1 ]]; then
  + NIGHTLY_FLAG="--nightly_flag"
  +fi
  +
  PIP_WHL_DIR=whl
  mkdir -p ${PIP_WHL_DIR}
  PIP_WHL_DIR=$(readlink -f ${PIP_WHL_DIR}) # Get absolute path
  -bazel-bin/tensorflow/tools/pip_package/build_pip_package "${PIP_WHL_DIR}"
  +bazel-bin/tensorflow/tools/pip_package/build_pip_package "${PIP_WHL_DIR}" "${NIGHTLY_FLAG}"
  WHL_PATH=$(ls "${PIP_WHL_DIR}"/*.whl)
  cp "${WHL_PATH}" "$(pwd)"/.
  