I wasn't clear to me from the article alone how GNU Stow decides where to put the files. Looking it up in the manfile stow uses the parent directory of the "stow directory" by default.

You can change this behaviour using the --target and --dir options, where setting --dir will set the target dir to the parent of what you set for --dir.

I don't think it's possible to configure a target in the package itself, as far as I can see from reading the man page.