With JupyterLab 1.1, --dev-build=False is no longer necessary.

scipy-notebook/Dockerfile

@@ -50,7 +50,7 @@ RUN conda install --quiet --yes \
     # https://github.com/jupyter-widgets/ipywidgets/tree/master/packages/jupyterlab-manager
     jupyter labextension install @jupyter-widgets/jupyterlab-manager@^1.0.1 --no-build && \
     jupyter labextension install jupyterlab_bokeh@1.0.0 --no-build && \
-    jupyter lab build --dev-build=False && \
+    jupyter lab build && \
     npm cache clean --force && \
     rm -rf $CONDA_DIR/share/jupyter/lab/staging && \
     rm -rf /home/$NB_USER/.cache/yarn && \