I have just tested it - built the whole thing.
This is the only thing that yay (and pamac as well) do not handle easily.
You have to manually build python-pyasyncore
mkdir ./test
cd test
wget https://aur.archlinux.org/cgit/aur.git/snapshot/python-pyasyncore.tar.gz
tar -xzf python-pyasyncore.tar.gz
cd python-pyasyncore
updpkgsums
makepkg -i
(better use just makepkg … without the -i option
and use pacman --asdeps -U packagename to install it)
Isn’t playonlinux just meant to ease installation and for ease of managing wine prefixes?
These will then still work - just new things can’t be installed if you don’t have playonlinux anymore.
But: you still have it - just not the newest version.