Just a friendly heads-up:

Cannot mix incompatible Qt library (5.15.7) with this library (5.15.6)

I understand that Obarun's Git is a better place for this, but I believe I am not technically adept enough to have an active say in Obarun's core devlopment, thus my absence from there.

For those with lightning-fast fingers, here is a pacman hook that would abort any updates as long as there is a qt5 version mismatch:
https://forum.obarun.org/viewtopic.php?pid=5069# p5069
Should have noticed this nifty trick earlier!