Haunt a Gold Mine

Yeah, it's me again. :(

I still haven't figured that one out, you might remember my posts about the topic about a month ago.

Okay, here's where I am now. I scrapped the idea of a direct build from the unit the player is controlling because it's a hero. That just doesn't seem to work. Instead of haunting the existing gold mine, the hero wants to build a completely new haunted one. I can't build over the existing.

Then I created a dummy spell to trigger the "Neutral Building - Haunt gold mine (instantly)" action for the owner of the casting unit, but that doesn't work either.

Using a dummy unit as intermediate helped no further. I'm at a complete loss now.

Say, it can't be that hard to order an acolyte to haunt a gold mine, can it? I figure that's all I need to know to make it work after all.

I'm afraid I can't remember the contents of the last question that you're referring to. Could you re-post it here or link us?
Also, ordering units via triggers would be a Trigger Haven question, and so there it goes.