bug#71397: Issues with DJ app Mixxx

[MGD]

Hello,

My apologies if this is not presented correctly.

I ran a guix pull yesterday night (UK time) and now Mixxx is not 
working. I removed and reinstalled the app with no luck

Adding a track to either deck locks the app. The track is not loaded 
either. I would ask on Mixxx's github but the current version is 2.4 
while Guix only goes up to 2.3.6

happy to share any other settings or info needed

---
MGD