diff --git a/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix b/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
index 03210bca371c..2edd81045dde 100644
--- a/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
+++ b/nixos/modules/services/networking/magic-wormhole-mailbox-server.nix
@@ -1,11 +1,19 @@
-{ config, lib, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 
 with lib;
 
 let
   cfg = config.services.magic-wormhole-mailbox-server;
   dataDir = "/var/lib/magic-wormhole-mailbox-server;";
-  python = pkgs.python3.withPackages (py: [ py.magic-wormhole-mailbox-server py.twisted ]);
+  python = pkgs.python3.withPackages (py: [
+    py.magic-wormhole-mailbox-server
+    py.twisted
+  ]);
 in
 {
   options.services.magic-wormhole-mailbox-server = {
@@ -23,6 +31,5 @@ in
         StateDirectory = baseNameOf dataDir;
       };
     };
-
   };
 }