Why? Because this way configuration.nix(5) can be read linearly. Before: > virtualisation.xen.bootParams > ... > virtualisation.xen.enable > ... > virtualisation.xen.package > ... After: > virtualisation.xen.enable > virtualisation.xen.package > virtualisation.xen.bootParams > ...
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.