[infinity85]

well, the problem with that is, that the reported missing dependency is libreelec itself.

Ah okay :/

In this case you could try to use librespot directly (not the addon version): https://github.com/plietar/librespot
The addon-way is only necessary on libreelec because of its restricted system style. The addon itself is working as a service in the background, so it hasn't any interaction or playercontrols etc. in kodi itself. So once you install the original librespot code on your system, it will run in background the same way on any system.