diff --git a/pkgs/e11sync-backend.nix b/pkgs/e11sync-backend.nix
index dc5952a..f1d8ac5 100644
--- a/pkgs/e11sync-backend.nix
+++ b/pkgs/e11sync-backend.nix
@@ -42,11 +42,11 @@ in
       makeWrapper ${uwsgi-python}/bin/uwsgi $out/bin/e11sync-backend \
         --chdir $out/app \
         --set-default E11SYNC_HTTP_PORT ${toString backendPort} \
-        --add-flags "--plugin ${uwsgi-python}/lib/uwsgi/python3_plugin.so" \
+        --add-flags "--need-plugin ${uwsgi-python}/lib/uwsgi/python3_plugin.so" \
         --add-flags "--python-path ${pythonEnv}/lib/${pythonEnv.libPrefix}/site-packages" \
         --add-flags "--http-socket 127.0.0.1:${toString backendPort}" \
         --add-flags "--wsgi-file e11sync/wsgi.py" \
-        --add-flags --master \
+        --add-flags "--master --need-app" \
         ${lib.optionalString (databasePath != null) ''
         --set E11SYNC_DATABASE_PATH "${databasePath}" \
       ''} \