diff --git a/config/services/promtail.nix b/config/services/promtail.nix
index 701f7ca7..2bdd22b7 100644
--- a/config/services/promtail.nix
+++ b/config/services/promtail.nix
@@ -35,7 +35,7 @@ in
 
     serviceConfig = {
       ExecStart = ''
-        ${pkgs.grafana-loki}/bin/promtail --config.file ${lib.generators.toYAML promtail_config}
+        ${pkgs.grafana-loki}/bin/promtail --config.file ${lib.generators.toYAML {} promtail_config}
       '';
     };
   };