I wonder if ExtUtils::MakeMaker is the culprit. I'm using version 6.31 - might be worth your while checking that you also have 6.31, and updating if you have an older version. (I think I might have upgraded EU::MM at some stage.)
In the meantime I'll doublecheck that it does work with version 4.7 of dmake (and update this post as soon as I find out for sure).
Yep - definitely building fine for me on AS build 817 using dmake-4.7.