diff --git a/coolq/api.go b/coolq/api.go
index 8567ce8..ddf2dbe 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -28,6 +28,9 @@ import (
 var Version = "unknown"
 
 func init() {
+	if Version != "unknown" {
+		return
+	}
 	info, ok := debug.ReadBuildInfo()
 	if ok {
 		Version = info.Main.Version