diff --git a/nix/coordinator.nix b/nix/coordinator.nix
index c3b7359..80a21f0 100644
--- a/nix/coordinator.nix
+++ b/nix/coordinator.nix
@@ -117,6 +117,7 @@ in
               "gerrit.lix.systems",
               "buildbot",
               2022,
+              "/var/lib/buildbot/master/id_gerrit",
               url=${builtins.toJSON config.services.buildbot-master.buildbotUrl},
               nix_eval_max_memory_size=${builtins.toJSON cfg.evalMaxMemorySize},
               nix_eval_worker_count=${if cfg.evalWorkerCount == null then "None" else builtins.toString cfg.evalWorkerCount},