Status of Win64 DMD/MSVC path situation?

[Nick Sabalausky]

I know there's been some work/discussion regarding improvements to how
DMD/sc.ini/whatever handles the paths for MSVC for Win64 builds. I
haven't been following that closely, so I wanted to ask: What's the
current state of that? Is it decided how 2.064 is going to deal with
that, and if so, how exactly?