--- a/make/jogamp-androidtasks.xml
+++ b/make/jogamp-androidtasks.xml
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project name="jogamp-androidtasks" basedir=".">
     <dirname property="jogamp-androidtasks.basedir" file="${ant.file.jogamp-androidtasks}"/>
-    <taskdef resource="net/sf/antcontrib/antlib.xml">
-      <classpath> 
-        <pathelement location="${jogamp-androidtasks.basedir}/lib/ant-contrib-1.0b3.jar"/> 
-      </classpath>
-    </taskdef>
+    <taskdef resource="net/sf/antcontrib/antlib.xml" />
 
     <target name="test.regexp1" >
         <property name="jarbasename" value="gluegen-rt-android" />
--- a/make/gluegen-cpptasks.xml
+++ b/make/gluegen-cpptasks.xml
@@ -20,7 +20,7 @@
 
   <!-- import cpptasks -->
   <!--typedef resource="net/sf/antcontrib/cpptasks/antlib.xml" classpath="${gluegen.root}/make/lib/cpptasks.jar;${gluegen.root}/make/lib/CppTasksGCCNamespaceHack.jar"/-->
-  <typedef resource="net/sf/antcontrib/cpptasks/antlib.xml" classpath="${gluegen.root}/make/lib/cpptasks.jar"/>
+  <typedef resource="net/sf/antcontrib/cpptasks/antlib.xml" />
 
   <!-- 0 fetch environment variable GLUEGEN_CPPTASKS_FILE -> gluegen-cpptasks.file -->
   <property environment="env" />
--- a/make/jogamp-archivetasks.xml
+++ b/make/jogamp-archivetasks.xml
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project name="jogamp-archivetasks" basedir=".">
     <dirname property="jogamp-archivetasks.basedir" file="${ant.file.jogamp-archivetasks}"/>
-    <taskdef resource="net/sf/antcontrib/antlib.xml">
-      <classpath> 
-        <pathelement location="${jogamp-archivetasks.basedir}/lib/ant-contrib-1.0b3.jar"/> 
-      </classpath>
-    </taskdef>
+    <taskdef resource="net/sf/antcontrib/antlib.xml" />
 
     <macrodef name="archive.7z">
       <attribute name="basedir" />