Try to use Johan's workaround to enable xeus-cling installation

3 jobs for master in 37 minutes and 6 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #362340
build-image

00:37:06

 
  Test
skipped #362341
tests_python_packages
skipped #362342
tests_R_packages
 
Name Stage Failure
failed
build-image Build
    raise KeyError(u'The Python module {} does not include any valid server extensions'.format(module))
KeyError: 'The Python module jupyter_server_proxy does not include any valid server extensions'
The command '/bin/bash -o pipefail -c jupyter serverextension enable --py jupyter_server_proxy' returned a non-zero code: 1
Running after_script
Running after script...
$ docker logout $CI_REGISTRY
Removing login credentials for gitlab-registry.in2p3.fr
Cleaning up file based variables
ERROR: Job failed: exit code 1