Should be easy but i can't find the right trigger?

How to remove a peon from game after he just built something without using the ancient classification and night elf peon.

i tryed with trigger but i could find only constructing building and constructed building, i can use only triggering unit for the peon but it doesn't seem to work, would anyone know how to trigger it?

Thanks for your help.
:ggani:

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Trigger
Events
Unit - A unit Finishes construction
Conditions
(Triggering unit) Equal to Your_Peon
Actions
Unit - Kill (Triggering unit)
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Hope that works, the condition can be replaced with (Unit-type of (Triggering unit)) Equal to Peon if you like, depends on if you want it to happen to only one specific peon or every peon.

To save lag you could use the Play Specific version of that event.