move nixpkgs.overlay to nixos module

flake.nix

@@ -13,12 +13,6 @@
       "aeolia" = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
-          ({ pkgs, ... }: { nixpkgs.overlays = [
-            (final: super: {
-              makeModulesClosure = x:
-                super.makeModulesClosure (x // { allowMissing = true; });
-            })
-          ]; })
           ./nixos
           ./installer.nix
         ];

nixos/default.nix

@@ -58,6 +58,13 @@
   };
 
   config = let cfg = config.ps4; in lib.mkIf cfg.enable {
+    nixpkgs.overlays = [
+      (final: super: {
+        makeModulesClosure = x:
+          super.makeModulesClosure (x // { allowMissing = true; });
+      })
+    ];
+        
     # TODO write definitions for the other southbridges
     boot.kernelPackages = pkgs.recurseIntoAttrs (pkgs.linuxPackagesFor (pkgs.callPackage ../kernel/kernel-aeolia-5.3.nix {}));