As I explain in my comment in the other post, this is solved in Boost.CMake but it’s still in a feature branch. We will hopefully merge it once CMake ships import std as stable. Boost.Any is not part of the original module proposal. I’d prefer if you could make comments on the feature branches I linked in the other post (particularly the one in Boost.Mp11), as I think that’s gonna be more useful for us. Thanks.