problem to compile with apt-build

[david x <cata_j@hotpop.com>]

   Hi I have a problem when I compile libc6.

I'm a user of apt-build and when I use the apt-build 0.7 
with sid fails in the package libc6.
And in most packages the error is that fails the dependencies 
because need libstdc++6.1.
This problems are by my configuration , or it's for apt-build , or 
debian sources??