Initialize nix-darwin config for darwinix

lib/default.nix

@@ -1,13 +1,14 @@
 {
   inputs,
   pkgs,
+  darwinPkgs,
   lib,
   ...
 }: {
   # Import my own library functions.
   # Those are defined as functions returning sets of library functions,
   # so those functions have to be called when importing.
-  nixos = import ./nixos.nix {inherit inputs pkgs lib;};
+  nixos = import ./nixos.nix {inherit inputs pkgs darwinPkgs lib;};
   modules = import ./modules.nix {inherit inputs pkgs lib;};
   networking = import ./networking.nix {inherit inputs pkgs lib;};
   rofi = import ./rofi.nix {inherit inputs pkgs lib;};