New issue by dinama on void-packages repository

https://github.com/void-linux/void-packages/issues/18491

Description:
<!-- Don't request update of package. We have a script for that. https://alpha.de.repo.voidlinux.org/void-updates/void-updates.txt . However, a quality pull request may help. -->
### System

* xuname:  Void 5.4.13_2 x86_64 GenuineIntel notuptodate rrFF
* package:  Waybar-0.9.0_1

### Expected behavior

"modules-right": ["tray"] 

### Actual behavior

only warning in log:

 [warning] For a functional tray you must have libappindicator-* installed and export XDG_CURRENT_DESKTOP=Unity