diff --git a/hosts/nachtigall/apps/matrix/mautrix-telegram.nix b/hosts/nachtigall/apps/matrix/mautrix-telegram.nix
index b9fb60a..d5b5010 100644
--- a/hosts/nachtigall/apps/matrix/mautrix-telegram.nix
+++ b/hosts/nachtigall/apps/matrix/mautrix-telegram.nix
@@ -205,7 +205,19 @@
     lottieconverter  # for animated stickers conversion, unfree package
     ffmpeg           # if converting animated stickers to webm (very slow!)
   ];
-  systemd.services.mautrix-telegram.serviceConfig = {
+  systemd.services.mautrix-telegram.serviceConfig =
+  let
+    cfg = config.services.mautrix-telegram;
+    settingsFormat = pkgs.formats.json {};
+    settingsFile =
+      settingsFormat.generate "mautrix-telegram-config.json" cfg.settings;
+  in
+  {
     User = "matrix-synapse";
+    ExecStart = ''
+        ${pkgs.mautrix-telegram}/bin/mautrix-telegram \
+      --config='${settingsFile}'
+      --no-update
+    '';
   };
 }