diff --git a/build.third_step0.gradle b/build.third_step0.gradle
index 9e9ca2513..c61956233 100644
--- a/build.third_step0.gradle
+++ b/build.third_step0.gradle
@@ -22,7 +22,6 @@ def srcDir="."
 
 task unJar{
 	ant{	
-		delete(dir:"build")
 		mkdir(dir:"build/classes/main")
 		println "------------------------------------------------unjar"
 
diff --git a/build.third_step1.gradle b/build.third_step1.gradle
index cd6c3d070..16053b720 100644
--- a/build.third_step1.gradle
+++ b/build.third_step1.gradle
@@ -15,6 +15,14 @@ jar{
 
 def srcDir="."
 
+
+task unJar{
+	ant{	
+		delete(dir:"build")
+	}
+}
+
+
 //ÉèÖÃÔ´Âë·¾¶
 sourceSets{
 	main{