Update postBuild

3 jobs for development-lab in 4 minutes and 20 seconds
Name Stage Failure
build-docker Build
Removing intermediate container 238c12ab4d3c
---> 1894abb98a98
Step 14/15 : RUN /tmp/postBuild.sh
---> Running in f2ba3672891b
-\|/-\An error occured.
ValueError: "@jupyter-widgets/jupyterlab-manager@@1.1" is not a valid npm package
See the log file for details: /tmp/jupyterlab-debug-zka68f1w.log
The command '/bin/sh -c /tmp/postBuild.sh' returned a non-zero code: 1
ERROR: Job failed: exit code 1