diff --git a/pdex/.externalToolBuilders/Ant_Builder.launch b/pdex/.externalToolBuilders/Ant_Builder.launch
index 9b95f0090..2f93ff37a 100644
--- a/pdex/.externalToolBuilders/Ant_Builder.launch
+++ b/pdex/.externalToolBuilders/Ant_Builder.launch
@@ -12,7 +12,7 @@
 <stringAttribute key="org.eclipse.jdt.launching.CLASSPATH_PROVIDER" value="org.eclipse.ant.ui.AntClasspathProvider"/>
 <booleanAttribute key="org.eclipse.jdt.launching.DEFAULT_CLASSPATH" value="true"/>
 <stringAttribute key="org.eclipse.jdt.launching.PROJECT_ATTR" value="processing-experimental"/>
-<booleanAttribute key="org.eclipse.ui.externaltools.ATTR_BUILDER_ENABLED" value="true"/>
+<booleanAttribute key="org.eclipse.ui.externaltools.ATTR_BUILDER_ENABLED" value="false"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_LOCATION" value="${workspace_loc:/processing-experimental/build.xml}"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_RUN_BUILD_KINDS" value="full,incremental,auto,clean"/>
 <booleanAttribute key="org.eclipse.ui.externaltools.ATTR_TRIGGERS_CONFIGURED" value="true"/>