diff --git a/proposal/myrmidon/src/manifest/base-ant-descriptor.xml b/proposal/myrmidon/src/manifest/builtin-ant-descriptor.xml
similarity index 78%
rename from proposal/myrmidon/src/manifest/base-ant-descriptor.xml
rename to proposal/myrmidon/src/manifest/builtin-ant-descriptor.xml
index 820befac5..ad94f1c84 100644
--- a/proposal/myrmidon/src/manifest/base-ant-descriptor.xml
+++ b/proposal/myrmidon/src/manifest/builtin-ant-descriptor.xml
@@ -6,10 +6,9 @@
     <aspect name="noop" classname="org.apache.myrmidon.aspects.NoopAspectHandler"/>
 
     <!-- basic tasks/datatypes/coverters required in most environments -->
-<!--
     <task name="pattern" classname="org.apache.myrmidon.framework.TypeInstanceTask" />
-    <data-type name="pattern" classname="org.apache.ant.modules.basic.Pattern" />
--->
+    <data-type name="pattern" classname="org.apache.myrmidon.framework.Pattern" />
+
   </types>
 
 </ant-lib>
\ No newline at end of file
diff --git a/proposal/myrmidon/src/manifest/base-ant-roles.xml b/proposal/myrmidon/src/manifest/builtin-ant-roles.xml
similarity index 100%
rename from proposal/myrmidon/src/manifest/base-ant-roles.xml
rename to proposal/myrmidon/src/manifest/builtin-ant-roles.xml