diff --git a/hydra-module.nix b/hydra-module.nix
index 1b8d8663..ebaa0619 100644
--- a/hydra-module.nix
+++ b/hydra-module.nix
@@ -244,6 +244,16 @@ in
           };
       };
 
+    systemd.services."hydra-evaluator@" =
+      { path = [ pkgs.nettools ];
+        environment = env;
+        serviceConfig =
+          { ExecStart = "@${cfg.hydra}/bin/hydra-evaluator hydra-evaluator %I";
+            User = "hydra";
+            Type = "oneshot";
+          };
+      };
+
     systemd.services."hydra-update-gc-roots" =
       { wants = [ "hydra-init.service" ];
         after = [ "hydra-init.service" ];