MarsSeed [1] filed a deletion request for nbmanager-git [2]: Broken package, last changed in 2018. Upstream is not maintained since 2019. [a]
GitHub git:// source URL is dead since March 2022. Also dependency 'jupyter' does not exist. Votes: 0 Popularity: 0.000000 Comments: 1 (from 2022, about the broken GitHub URL) [a]: https://github.com/jupyter/nbmanager [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/nbmanager-git/
