The 1.8.1 binary (or any stable) install for Ubuntu seems to be missing
The merrygoround of installing 1.8..
Home page https://www.winehq.org/ Latest releases Stable 1.8.1, clicking on takes you to
https://www.winehq.org/download
Wine binary packages 1.8.1, clicking on takes you to
https://www.winehq.org/announce/1.8.1
text there
Which takes me back to where I was?
I have not tried the source package links. I'd prefer a binary install