phoc 0.12.0 needs Breaks against mesa (and potentially livglvnd0)
sudo apt install -t octarine libegl-mesa0 libgl1-mesa-dri libegl1-mesa-dev libglx-mesa0 mesa-va-drivers mesa-vdpau-drivers mesa-vulkan-drivers libglapi-mesa libgbm1 (not sure if all of these are necessary, I just upgraded every package with
mesa in its name that were already installed) phoc 0.12.0 is happy again.
phoc only (if I understood correctly)
Breaks against libglvnd0 for additional outputs to be correctly recognized.