Force a custom surface shader to not compile a deferred pass?

I have a custom surface shader that requires depth information from the scene and as such cannot be rendered as part of the Deferred workflow. So like a standard transparency shader I want it to be rendered after the deferred rendering has been completed, in a forward pass.

So to force my surface shader to NOT have a deferred pass I set it up like so:

 #pragma surface surf Standard vertex:vert exclude_path:deferred

Unfortunately Unity decided to ignore my exclude_path:deferred statement and it continues to compile a deferred pass. I got some help in my Unity Forums Topic and by adding alpha it looks like the deferred stop compiling BUT it also turned of ZWrite which I need for my shader.

I was advised to use keepalpha instead of alpha but the result I'm getting is that ZWrite comes back but so does the deferred pass.

How do I make this work the way I want?