diff --git a/src/com/golang/stages/BuildService.groovy b/src/com/golang/stages/BuildService.groovy
index 0568fad..0c17038 100644
--- a/src/com/golang/stages/BuildService.groovy
+++ b/src/com/golang/stages/BuildService.groovy
@@ -261,6 +261,8 @@ class BuildService implements Serializable {
             script.sh "go mod verify"
 
             script.echo "🔨 开始编译Go程序..."
+            // goFilePath 可能为空；为空时不拼接路径
+            def mainPath = goFilePath ? "${goFilePath}/${mainFile}" : mainFile
             // 执行编译命令
             if (buildFlags) {
                 script.sh "go build ${buildFlags} -o ${goFile} ${mainFile}"