How to set the path environment variable from ant script

Question

How to set the path environment variable from ant script

Answer 1

since I don't have enough reputation to comment on the suggestions my comment as an answer ... :-/

In ("newer") ant-contrib (extra ANT package) the task is not called but !

(but it didn't work for me anyways since I think the manipulation of the env.* (created by task) Java properties/variables is only relevant for tasks/processes evaluating these Java properties which are not automatically "synced back" to the OS environment variables)