diff --git a/hydra-module.nix b/hydra-module.nix
index 8e728ee6..c4732990 100644
--- a/hydra-module.nix
+++ b/hydra-module.nix
@@ -258,7 +258,7 @@ in
       { wantedBy = [ "multi-user.target" ];
         requires = [ "hydra-init.service" ];
         after = [ "hydra-init.service" "network.target" ];
-        path = [ pkgs.nettools ];
+        path = [ pkgs.nettools pkgs.ssmtp ];
         environment = env // {
           PGPASSFILE = "${baseDir}/pgpass-queue-runner"; # grrr
           IN_SYSTEMD = "1"; # to get log severity levels
@@ -276,7 +276,7 @@ in
       { wantedBy = [ "multi-user.target" ];
         requires = [ "hydra-init.service" ];
         after = [ "hydra-init.service" "network.target" ];
-        path = [ pkgs.nettools ];
+        path = [ pkgs.nettools pkgs.ssmtp ];
         environment = env;
         serviceConfig =
           { ExecStart = "@${cfg.package}/bin/hydra-evaluator hydra-evaluator";