Index: /trunk/build.xml
===================================================================
--- /trunk/build.xml	(revision 14257)
+++ /trunk/build.xml	(revision 14258)
@@ -610,5 +610,5 @@
         </jacoco:report>
     </target>
-    <target name="dist-optimized" depends="dist">
+    <target name="dist-optimized" depends="dist" unless="isJava11">
         <taskdef resource="proguard/ant/task.properties" classpath="${tools.dir}/proguard.jar"/>
         <proguard>
@@ -675,5 +675,5 @@
         </exec>
     </target>
-    <target name="check-plugins" depends="dist-optimized" description="Check of plugins binary compatibility">
+    <target name="check-plugins" depends="dist-optimized" description="Check of plugins binary compatibility" unless="isJava11">
         <local name="dir"/>
         <local name="plugins"/>