diff --git a/pkgs/default.nix b/pkgs/default.nix
index 9a1f4d5..a65bcac 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -2,14 +2,15 @@
   ...
 }:
 
-{
-  nixpkgs.config = {
-    packageOverrides = pkgs: {
-      dina-vector = pkgs.callPackage ./fonts/dina-vector.nix { };
-      dina-psf = pkgs.callPackage ./fonts/dina-psf.nix { };
-      wqy-zenhei = pkgs.callPackage ./fonts/wqy-zenhei.nix { };
-      wqy-microhei = pkgs.callPackage ./fonts/wqy-microhei.nix { };
-      wqy-bitmapsong = pkgs.callPackage ./fonts/wqy-bitmapsong.nix { };
-    };
+let
+  overlay = final: prev: {
+    dina-vector = prev.callPackage ./fonts/dina-vector.nix { };
+    dina-psf = prev.callPackage ./fonts/dina-psf.nix { };
+    wqy-zenhei = prev.callPackage ./fonts/wqy-zenhei.nix { };
+    wqy-microhei = prev.callPackage ./fonts/wqy-microhei.nix { };
+    wqy-bitmapsong = prev.callPackage ./fonts/wqy-bitmapsong.nix { };
   };
+in
+{
+  nixpkgs.overlays = [ overlay ];
 }