diff --git a/cmd/weatherstationctl/main.go b/cmd/weatherstationctl/main.go
index 9cec0df..0d9c4d9 100644
--- a/cmd/weatherstationctl/main.go
+++ b/cmd/weatherstationctl/main.go
@@ -32,7 +32,8 @@ func main() {
 
 	for _, svc := range serviceDirs {
 		out := filepath.Join(binDir, svc)
-		pkg := filepath.ToSlash(filepath.Join("./cmd", svc))
+		// 必须使用相对前缀 ./，否则 go 会将其当成标准库/模块路径
+		pkg := "./" + filepath.ToSlash(filepath.Join("cmd", svc))
 		fmt.Printf("编译 %s -> %s\n", pkg, out)
 		if err := run("go", "build", "-o", out, pkg); err != nil {
 			fatalf("编译失败 %s: %v", pkg, err)