diff --git a/build.xml b/build.xml
index 814774d..f74c6de 100644
--- a/build.xml
+++ b/build.xml
@@ -290,41 +290,21 @@
     />
 
 
-    <ivy:cachepath conf="build.jython2.0" pathid="ivy.dep.jython2.0" />
+    <ivy:cachepath conf="build.jython2.5" pathid="ivy.dep.jython2.5" />
     <javac srcdir="build/src-main-java-filtered" destdir="build/classes" deprecation="off"
       debug="on" optimize="off" target="1.7" source="1.7" encoding="utf-8"
       includeantruntime="false"
-      classpathref="ivy.dep.jython2.0"
+      classpathref="ivy.dep.jython2.5"
       bootclasspath="${boot.classpath.j2se1.7}"
       includes="
         freemarker/ext/ant/**,
         freemarker/template/utility/JythonRuntime.java,
         freemarker/ext/jython/**"
       excludes="
-        freemarker/ext/jython/_Jython22VersionAdapter.java,
-        freemarker/ext/jython/_Jython25VersionAdapter.java"
-    />
-
-    <ivy:cachepath conf="build.jython2.2" pathid="ivy.dep.jython2.2" />
-    <javac srcdir="build/src-main-java-filtered" destdir="build/classes" deprecation="off"
-      debug="on" optimize="off" target="1.7" source="1.7" encoding="utf-8"
-      includeantruntime="false"
-      classpathref="ivy.dep.jython2.2"
-      bootclasspath="${boot.classpath.j2se1.7}"
-      includes="
+        freemarker/ext/jython/_Jython20And21VersionAdapter.java,
         freemarker/ext/jython/_Jython22VersionAdapter.java"
     />
 
-    <ivy:cachepath conf="build.jython2.5" pathid="ivy.dep.jython2.5" />
-    <javac srcdir="build/src-main-java-filtered" destdir="build/classes" deprecation="off"
-      debug="on" optimize="off" target="1.7" source="1.7" encoding="utf-8"
-      includeantruntime="false"
-      classpathref="ivy.dep.jython2.5"
-      bootclasspath="${boot.classpath.j2se1.7}"
-      includes="
-        freemarker/ext/jython/_Jython25VersionAdapter.java"
-    />
-
     <rmic base="build/classes" classpathref="ivy.dep"
       includes="build/src-main-java-filtered/freemarker/debug/impl/Rmi*Impl.class"
       verify="yes" stubversion="1.2"
diff --git a/ivy.xml b/ivy.xml
index 065a3ba..d7af30f 100644
--- a/ivy.xml
+++ b/ivy.xml
@@ -49,12 +49,6 @@
         description="for building FreeMarker with JSP 2.1 support"
     />
 
-    <conf name="build.jython2.0" extends="build.base"
-        description="for building FreeMarker with Jython 2.0 support"
-    />
-    <conf name="build.jython2.2" extends="build.base"
-        description="for building FreeMarker with Jython 2.2 support"
-    />
     <conf name="build.jython2.5" extends="build.base"
         description="for building FreeMarker with Jython 2.5 support"
     />
@@ -106,9 +100,6 @@
     
     <dependency org="rhino" name="js" rev="1.6R1" conf="build.base->default" />
 
-    <!-- We use Jython 2.1 because there was no 2.0 in central; the relevant methods are the same. -->
-    <dependency org="jython" name="jython" rev="2.1" conf="build.jython2.0->default" />
-    <dependency org="org.python" name="jython" rev="2.2.1" conf="build.jython2.2->default" />
     <dependency org="org.python" name="jython" rev="2.5.0" conf="build.jython2.5->default" />
     
     <dependency org="avalon-logkit" name="avalon-logkit" rev="2.0" conf="build.base->default" />
