I'm using ale for such a long time already …
Add necessary python package which is used by the plugin.
Keep old version 0, as no snippet was migrated yet. Need to migrate them prior usage of version 1.
I managed my setup manually. This commit ports the existing setup to home-manager. The program module is used to install neovim together with plugins. Custom plugins are now maintained at Gitea / GitHub and loaded via nix as well.