there is a 10% chance this works

modules/nixos/core/nix.nix

@@ -1,6 +1,12 @@
-{ lib, ... }:
+{ lib, inputs, ... }:
 
-{
+let
+  importOverlays = builtins.map
+    (overlay: overlay { inherit lib inputs; })
+    (builtins.filter 
+      (file: builtins.match file "*.nix")
+      (lib.filesystem.listFilesRecursive ../../../overlays));
+in {
   nix = {
     settings = {
       auto-optimise-store = true;
@@ -18,5 +24,6 @@
       allowUnfree = true;
     };
     hostPlatform = lib.mkDefault "x86_64-linux";
+    overlays = importOverlays;
   };
 }