I have tested Marco's patch against debootstrap 1.0.78. It applied cleanly, the package built fine under pbuilder, and it solved the problem I was experiencing with live-build (see bug #571136 [1]). I have only verified it using live-build, not using two-staged bootstrapping directly.
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=571136#128 Cheers, Jason Heeris