diff --git a/build.xml b/build.xml
index 267c413..defe5ac 100644
--- a/build.xml
+++ b/build.xml
@@ -65,6 +65,7 @@
   </target>
 
   <target name="history">
+    <antcall target="clean" />
     <exec executable="bash">
       <env key="DIFF_FILE" value="${history.diff.file}"/>
       <arg value="${history.script}"/>