[oXygen-user] JAVA_HOME and ANT_HOME in transformation scenario

Hi, I am creating a custom default file with a requirement of running the transformation scenarios against a specific ANT and JDK version which is distributed via source control. I see that there is a custom ANT and JAVA option in the ANT scenario option (Preferences > Document Type Association > {Selected Framework} > Transformation > ANT Transformation >Options). However, this custom options does not seems to be taking in editor variables or relative paths. Could you please let me know how I could set an ANT transformation using non-fixed paths? Thanks! Nathan