NixOS 22.05がリリースされた
GUIでインストール可能になったらしい

NixOS 22.05 released - Announcements - NixOS Discourse
https://discourse.nixos.org/t/nixos-22-05-released/19404
NixOS 22.05 Released With New Graphical Installer - Phoronix
https://www.phoronix.com/scan.php?page=news_item&px=NixOS-22.05-Released
NixOS 22.05 Is Out with GNOME 42.1, Calamares Graphical Installer, and Linux 5.15 LTS - 9to5Linux
https://9to5linux.com/nixos-22-05-is-out-with-gnome-42-1-calamares-graphical-installer-and-linux-5-15-lts