The following packages have unmet dependencies:
librust-rspotify-dev : Depends: librust-base64-0.12+default-dev
Depends: librust-itertools-0.9+default-dev
Depends: librust-rand-0.7+default-dev
Depends: librust-reqwest-0.9+default-dev but it is not
installable
As far as I can tell, rspotify was packaged as a dependency of spotify-tui.
The problem is that while there is a new version of rspotify that has
modernised dependencies, spotify-tui was never updated to modernise it's
dependencies and was eventually removed from Debian.
https://github.com/Rigellute/spotify-tui/issues/915
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1018166
I don't think there is much value in fixing this package, until/unless
either spotify-tui is updated upstream and someone wants to get it
back into Debian or some other package comes up that needs rspotify
