message: Make tf-nightly pip depend on tf-estimator-nightly pip.
diff: @@ -87,7 +87,8 @@ if 'tf_nightly' in project_name:
  for i, pkg in enumerate(REQUIRED_PACKAGES):
  if 'tensorboard' in pkg:
  REQUIRED_PACKAGES[i] = 'tb-nightly >= 1.13.0a0, < 1.14.0a0'
  - break
  + if 'tensorflow_estimator' in pkg:
  + REQUIRED_PACKAGES[i] = 'tf-estimator-nightly'
  # weakref.finalize and enum were introduced in Python 3.4
  if sys.version_info < (3, 4):
  