message: Quickfix for failing CI builds.
diff: @@ -142,7 +142,7 @@ function install_pip_deps {
  ${SUDO_CMD} ${PIP_CMD} install portpicker
  ${SUDO_CMD} ${PIP_CMD} install scipy
  ${SUDO_CMD} ${PIP_CMD} install scikit-learn==0.20.3
  - ${SUDO_CMD} ${PIP_CMD} install --upgrade tb-nightly
  + ${SUDO_CMD} ${PIP_CMD} install --upgrade "tb-nightly>=2.1.*"
  ${PIP_CMD} install --user --upgrade attrs
  ${PIP_CMD} install --user --upgrade tf-estimator-nightly
  ${PIP_CMD} install --user --upgrade "future>=0.17.1"
  @@ -179,7 +179,7 @@ function install_ubuntu_16_pip_deps {
  "${PIP_CMD}" install scipy --user
  "${PIP_CMD}" install scikit-learn --user
  "${PIP_CMD}" install --user --upgrade tf-estimator-nightly
  - "${PIP_CMD}" install --user --upgrade tb-nightly
  + "${PIP_CMD}" install --user --upgrade "tb-nightly>=2.1.*"
  # ===================================================================
  }
  @@ -219,7 +219,7 @@ function install_macos_pip_deps {
  ${SUDO_CMD} ${PIP_CMD} install gast==0.2.2
  ${SUDO_CMD} ${PIP_CMD} install h5py==2.8.0
  ${SUDO_CMD} ${PIP_CMD} install --upgrade grpcio
  - ${SUDO_CMD} ${PIP_CMD} install --upgrade tb-nightly
  + ${SUDO_CMD} ${PIP_CMD} install --upgrade "tb-nightly>=2.1.*"
  ${PIP_CMD} install --user --upgrade attrs
  ${PIP_CMD} install --user --upgrade tf-estimator-nightly
  ${PIP_CMD} install --user --upgrade "future>=0.17.1"
  