freescout: fix passthru tests

This must be a flat attribute set, not a nested one.

pkgs/by-name/fr/freescout/package.nix

@@ -46,9 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  passthru.tests = {
-    inherit (nixosTests) freescout;
-  };
+  passthru.tests = lib.attrValues nixosTests.freescout;
 
   # Because freescout is searching for some folders only relative to it's own source location, we need to have the symlinks to the actual locations in here
   dontCheckForBrokenSymlinks = true;