diff --git a/common/nix.nix b/common/nix.nix
index 7deb378..f3741bf 100644
--- a/common/nix.nix
+++ b/common/nix.nix
@@ -13,5 +13,6 @@
     trusted-users = [ "root" ];
     auto-optimise-store = true;
   };
+  nix.registry.nixpkgs.flake = inputs.nixpkgs;
   nixpkgs.config.allowUnfree = false;
 }