If someone wanted to maintain the PKGBUILD for this project, it’d be trivial to include a patch that removes the code he added trying to make it not build.

Or, to make sure to not be in breach of the no-derivatives part of his lisence, just reimplement it and ship with a patch that fixes his “blocker”.

I wonder if he received permission from all the other contributors to change the license of their contributions.

NRK had a series on puberty that is no-nonsense, straight to the point. It was hosted by a physician. Most of it is on YouTube, and from a very brief look has English subtitles. Warning, it contains full frontal nudity. It should be quite informative. Watch it yourself and decide if you want your son to see it. I have no idea if it is geoblocked.

https://youtube.com/playlist?list=PLJX8EALqb4PzmhYdnK6AxcAhm45FyCCK-