lib/mkNixpkgs.nix: Add function to import nixpkgs with overlays

flake.nix

@@ -70,7 +70,6 @@
   };
   outputs = { self, nixpkgs, nixos-hardware, chaosevents, fernglas, nixos-exporter, solid-xmpp-alarm, ssh-to-age, ... }@inputs: let
     lib = import ./lib inputs;
-    localNixpkgs = import ./flake/nixpkgs.nix inputs;
   in {
     clerie.hosts = {
       aluminium = {
@@ -140,14 +139,17 @@
       clerie-overrides = import ./pkgs/overrides/overlay.nix;
     };
 
+    nixpkgs = nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ] (system:
+      lib.mkNixpkgs {
+        inherit system;
+      }
+    );
+
     packages = nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ] (system:
-      let
-       pkgs = localNixpkgs.${system};
-      in
       nixpkgs.lib.genAttrs (
         (builtins.attrNames (self.overlays.clerie-pkgs null null))
         ++ (builtins.attrNames (self.overlays.clerie-overrides null null))
-      ) (name: pkgs."${name}")
+      ) (name: self.nixpkgs."${system}"."${name}")
     );
 
     inherit lib self;