Because one of my goal is to learn to use pkgsrc anywhere and get used to crosscompiling, I'll download an older and more stable tree version. Otherwise, I knew that bmake is for non-netbsd system. I doubt that pkg_add non working at all, is because of the "testing part" of the packages, it is too big a bug. I mean, if it is, I don't imagine how is the 'current' branch.
That tree would be mostly devoid of bugs
http://ftp.netbsd.org/pub/pkgsrc/stable/pkgsrc.tar.bz2 is that right ?