I can’t really blame you, it’s a perfectly reasonable concatenation imo. Pretty sure I’ve at least rarely seen it over the years as well.

That said, he is correct that now “nix” is going to likely be popularly associated (especially with tech types that love excessive things) with the Nix language, package manager, and NixOS, which has really been gaining steam. Especially these past few years.

It was what I first thought of as well, given I use them.