nixos/nixpkgs.nix: Make independent

nixos/modules/misc/nixpkgs.nix

@@ -64,6 +64,8 @@ let
 in
 
 {
+  imports = [ ./assertions.nix ];
+
   options.nixpkgs = {
 
     pkgs = mkOption {

nixos/modules/misc/nixpkgs/test.nix

@@ -0,0 +1,8 @@
+{ lib, stdenv }:
+lib.recurseIntoAttrs {
+  invokeNixpkgsSimple =
+    (lib.nixos.core ({ config, modules, ... }: {
+      imports = [ modules.invokeNixpkgs ];
+      nixpkgs.system = stdenv.hostPlatform.system;
+    }))._module.args.pkgs.hello;
+}

nixos/tests/all-tests.nix

@@ -322,6 +322,7 @@ in
   nix-serve-ssh = handleTest ./nix-serve-ssh.nix {};
   nixops = handleTest ./nixops/default.nix {};
   nixos-generate-config = handleTest ./nixos-generate-config.nix {};
+  nixpkgs = pkgs.callPackage ../modules/misc/nixpkgs/test.nix { };
   node-red = handleTest ./node-red.nix {};
   nomad = handleTest ./nomad.nix {};
   novacomd = handleTestOn ["x86_64-linux"] ./novacomd.nix {};