Pre/post plugin should support Plan level actions

I added the Pre/Post Build Command Plugin to my testbed instance of Bamboo 3.4.3

What I found is that the pre and post build command is available IN A JOB.

I want an action that is before the first stage of the build plan and after the last stage of the build plan, not something before and after a job. I.e. something that is pre-the-build and post-the-build, not pre-job and post-job...

Is there a configuration option I missed somewhere?