After wondering why the new callback code wasn't running I remembered that getlino installed the pypi release, but when running `pip install -e lino/` it errored with :

ERROR: Could not install packages due to an EnvironmentError: [Errno 1] Operation not permitted: '/home/tonis/Projects/lino/py3/lib/python3.7/site-packages/~ino-19.10.0.dist-info/RECORD'