message: Install gast at known version and not the latest.
diff: @@ -458,6 +458,12 @@ install_tensorflow_pip() {
  # ImportError: No module named builtins
  ${PIP_BIN_PATH} install --upgrade "future>=0.17.1" || \
  die "Error: future install, upgrade FAILED"
  +
  + # Install the gast package in the virtualenv. Installing it in user system
  + # packages does not appear to port it over when creating a virtualenv.
  + ${PIP_BIN_PATH} install --upgrade "gast==0.2.2" || \
  + die "Error: gast install, upgrade FAILED"
  +
  }
  run_test_with_bazel() {
  