fail if can not delete
diff --git a/releng.wtpbuilder/scripts/build/buildutilities.xml b/releng.wtpbuilder/scripts/build/buildutilities.xml
index 0cdd92f..882c16e 100644
--- a/releng.wtpbuilder/scripts/build/buildutilities.xml
+++ b/releng.wtpbuilder/scripts/build/buildutilities.xml
@@ -19,7 +19,7 @@
 			todir="${buildDirectory}/${buildLabel}/backuporiginalzips" />
 
 		
-		<delete dir="{tmpsite}" failonerror="false"/>
+		<delete dir="{tmpsite}" verbose="true" />
 		<mkdir dir="${tmpsite}/unpacked/eclipse/features" />
 		<mkdir dir="${tmpsite}/unpacked/eclipse/plugins" />
 		
@@ -54,7 +54,7 @@
 		 <zip destfile="${buildDirectory}/${buildLabel}/${archiveName}"
 			       basedir="${tmpsite}/unpacked" update="false"	  />	
 		
-	    <delete dir="{tmpsite}" failonerror="false"/>
+		<delete dir="{tmpsite}" verbose="true" />
 	
 	</target>
 </project>
\ No newline at end of file