All 3 ebuilds have the following strict requirement: <dev-python/jupyter_client-6.2 I checked ipykernel-5.5.0/setup.py, there is the following line: 'jupyter_client' and it does not require <6.2 Portage shows a warning of conflict since dev-python/jupyter_client-6.2.0 is stable now. Please review this requirement
Please review this bug before stabilizing bug #788505
The restriction was added because there are actual failures with newer jupyter_client.
Thanks Michal, I have filed the upstream report here: https://github.com/ipython/ipykernel/issues/664