diff --git a/nixng/containers/matrix/synapse/synapse-package.nix b/nixng/containers/matrix/synapse/synapse-package.nix
index c829dc4..afd74a8 100644
--- a/nixng/containers/matrix/synapse/synapse-package.nix
+++ b/nixng/containers/matrix/synapse/synapse-package.nix
@@ -10,10 +10,10 @@ pkgs:
   matrix-synapse-unwrapped =
     pkgs.matrix-synapse-unwrapped.overridePythonAttrs (old: {
       patches = (old.patches or []) ++ [
-        (pkgs.fetchurl {
+        ((pkgs.fetchurl {
           url = "https://patch-diff.githubusercontent.com/raw/matrix-org/synapse/pull/16504.patch";
           hash = "sha256-hjUOmsl06gVPewRdg/DyO9E5bSkIRNBAFJIrWqUsT6Y=";
-        } // {
+        }) // {
           requiredSystemFeatures = [ "local" ];
         })
       ];