How to strip struct/class invariants?

[Artem Tarasov via Digitalmars-d-learn]

OK, so there was an old bug fixed in 2.067 
(https://issues.dlang.org/show_bug.cgi?id=4421) so that now 
unions apparently can't contain a struct that has invariants. It 
kinda makes sense, although I don't see why the invariants can be 
simply ignored, as they don't have as much importance as 
destructors/postblits.

But more to the point. I have a struct that has an invariant, and 
I wish to use it as a member of an union. With the latest 
compiler, I have to somehow remove the invariant. Is there some 
compile-time magic that I can use for this?