diff --git a/default.nix b/default.nix
index 13d97a8..44b9600 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,7 @@
-{
-  pkgs ? import <nixpkgs> { },
-}:
+let
+  pkgs = import <nixpkgs> {
+    config = { };
+    overlays = [ ];
+  };
+in
 import ./pkgs/all-packages.nix { } pkgs