
This allows for module arguments to be handled modularly, in particular allowing the nixpkgs module to handle the nixpkgs import internally. This creates the __internal option namespace, which should only be added to by the module system itself.
*** 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.