Ant 1.8 "warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds"

I installed Ant 1.8 and build Java applications with Ant. Then, I found the following message:

warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

You can find a good explanation of this warning with following link:

http://ant.1045680.n5.nabble.com/warning-includeantruntime-was-not-set-td2639463.html

There were incompatible change on Ant version 1.8. So, you may find the same message if you build old ant file with Ant 1.8.

Please just add includeantruntime="false" to javac task.