diff --git a/java/external/build.xml b/java/external/build.xml
index 6438dce..b652214 100644
--- a/java/external/build.xml
+++ b/java/external/build.xml
@@ -135,8 +135,25 @@
         <patternset refid="licenses.asf"/>
       </tarfileset>
     </tar>
+
+    <!-- Xerces would like a zipped version instead for various reasons
+        principally involving CVS limitations.  -->
     <gzip src="${build.dir}/${name.external}-${impl.version}-src.tar" zipfile="${build.dir}/${name.external}-${impl.version}-src.tar.gz"/>
     <delete file="${build.dir}/${name.external}-${impl.version}-src.tar" />
+    <zip zipfile="${build.dir}/${name.external}-${impl.version}-src.zip" >
+      <zipfileset dir="${src.dir}">
+        <patternset refid="external-srcs"/>
+      </zipfileset>
+      <zipfileset dir="${build.dir}">
+        <include name="manifest.commons"/>
+      </zipfileset>
+      <zipfileset dir="${licenses.external.dir}">
+        <patternset refid="licenses.external"/>
+      </zipfileset>
+      <zipfileset dir="${licenses.asf.dir}">
+        <patternset refid="licenses.asf"/>
+      </zipfileset>
+    </zip>
   </target>
 
   <target name="clean"