Let's take a look at the NixOS 25.05 release notes. ๐
Starting on the NixOS side of things: nixos-rebuild-ng
, a full rewrite of nixos-rebuild
in Python, is available for testing. You can enable it by setting system.rebuild.enableNg
in your configuration (to replace the old nixos-rebuild
), or by adding nixos-rebuild-ng
to your environment.systemPackages
(for side-by-side installation). It is expected that the next major version of NixOS (25.11) will ship with nixos-rebuild-ng by default.