diff --git a/pkg/devtool/tasks/apply_script_task.go b/pkg/devtool/tasks/apply_script_task.go
index fadbd1eb70..0576038f79 100644
--- a/pkg/devtool/tasks/apply_script_task.go
+++ b/pkg/devtool/tasks/apply_script_task.go
@@ -171,7 +171,7 @@ func mapStringSlice(f func(string) string, a []string) []string {
 }
 
 const (
-	agentInstalledKey   = "sys:monitor_agent"
+	agentInstalledKey   = "__monitor_agent"
 	agentInstalledValue = "true"
 )