diff --git a/modules/nix.nix b/modules/nix.nix
index 4d6cc08..39b1bed 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -10,7 +10,7 @@ let
       let
         # Load the system config and get the `nixpkgs.overlays` option
         # This fails gracefully if getFlake is not available
-        overlays = if builtins.hasAttr "getFlake" builtins
+        overlays = if (builtins.hasAttr "getFlake" builtins && builtins.pathExists "/var/src/config")
           then (builtins.getFlake "/var/src/config").nixosConfigurations.${config.networking.hostName}.config.nixpkgs.overlays
           else [ ];
       in