No separate package for nixpkgs

lib.nix

@@ -12,19 +12,11 @@
 
   mkSystem = { nixpkgs, system ? "x86_64-linux", rev ? "git", extraModules ? [ ], ... }:
     let
-      pkgs = import (nixpkgs) {
-        inherit (machine.config.nixpkgs) config overlays;
-      };
-      nixPath = pkgs.runCommand "nix-path"
-        { } ''
-        mkdir -p $out
-        ln -s "${nixpkgs}" $out/nixpkgs
-      '';
       machine = import "${nixpkgs}/nixos/lib/eval-config.nix" {
         inherit system;
         modules = [
           ({ ... }: {
-            nix.nixPath = [ "${nixPath}" ];
+            nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
           })
         ] ++ extraModules;
       };