https://waf.io/book/ says By default, the project name and version are set to noname and 1.0. To change them, it is necessary to provide two additional variables in the top-level project file - and waf code inspection confirms that waf itself only will use the top level VERSION. Some wscripts will use bld.env['VERSION'] but that will also just use the value set in the top wscript.
https://code.soundsoftware.ac.uk/projects/pyin https://code.soundsoftware.ac.uk/attachments/download/1458/pyin-v1.1.tar.gz