FYI that is the old unofficial wiki, the official NixOS wiki is at https://wiki.nixos.org/wiki/Impermanence (although this particular article is also outdated there)
I was active in the WoW server emulation scene somewhere around 2008 to 2012 and fondly look back on that time.
Especially the German forum darkwow.de (and later mmonerds.de) is one of the reasons I got into computer science and I'm still in touch with some of the former members.
Ten years later I got an MSc degree in computer science and programming is one of my most profound hobbies.
NixOS 24.05 contains an older version of zed, as feature updates are generally not backported to stable NixOS releases. Try running the package from nixos-unstable instead.