diff --git a/flake.nix b/flake.nix
index bdf81934..78e111a9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,8 +16,8 @@
   };
 
   outputs = { self, nixpkgs, utils, ... }@inputs:
-  rec {
-    overlay = final: prev: let
+  {
+    overlays.default = final: prev: let
       darwinOptions = final.lib.optionalAttrs final.stdenv.isDarwin {
         buildInputs = with final.darwin.apple_sdk.frameworks; [
           SystemConfiguration
@@ -150,7 +150,6 @@
         };
       };
     };
-    overlays.default = overlay;
   } //
     utils.lib.eachSystem (utils.lib.defaultSystems ++ ["aarch64-darwin"]) (system:
       let
diff --git a/nix/tests/common.nix b/nix/tests/common.nix
index 9e5f363b..6f4fa8c8 100644
--- a/nix/tests/common.nix
+++ b/nix/tests/common.nix
@@ -15,6 +15,9 @@
     };
   };
 
+  # The "nixos-test-profile" profile disables the `switch-to-configuration` script by default
+  system.switch.enable = true;
+
   virtualisation.graphics = false;
   virtualisation.memorySize = 1536;
   boot.loader.grub.enable = false;