I am trying to install the beets-popularity plugin on my beets installed via Docker on my Synology NAS. When running the install script i get this error:
…so it will not be installable via pip. Perhaps the plugin author deleted it from PyPI. If you want to forge ahead anyway, you would probably need to clone the repo yourself and install it from there.
From the screenshot you’ve provided, it seems like git isn’t installed in the container. As the container seems to be Alpine based, try apk add git (you may need an apk update to refresh the package repository before running this).
I don’t know how you do this with Synology, but if there’s a way you can add your own custom additional volume you can script it: Customizing our Containers | LinuxServer.io