diff --git a/backup.nix b/backup.nix
index b542aff..c10c2cd 100644
--- a/backup.nix
+++ b/backup.nix
@@ -98,11 +98,14 @@ in {
     wants = [ "network-online.target" ];
     requires = [ "postgresql.service" ];
 
-    unitConfig.onFailure = ''
+    unitConfig.OnFailure = ''
+      invocationId="$(systemctl show --value -p InvocationID misskey-backup.service)"
+      logs="$(journalctl _SYSTEMD_INVOCATION_ID= -u misskey-backup.service)"
+
       ${notifyError} "backup" "Misskey Backup Failure Notification" "$(<<EOMSG
       A backup process has failed. Logs to follow:
 
-      $(journalctl _SYSTEMD_INVOCATION_ID=$(systemctl show --value -p InvocationID misskey-backup.service) -u misskey-backup.service)
+      $logs
 
       EOMSG
       )