pbuilder calls debootstrap to create chroots, debootstrap will unpack and configure base Debian packages; I suspect debootstrap is failing due to a bug in some Debian package in sid. For instance this could be due to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=581420.
Try running "sudo debootstrap sid rootfs", you should see the actual failure in rootfs/debootstrap.log.
Please report bugs related to debootstrap failing against Debian, there's nothing we can fix on the Ubuntu side of things to make Debian debootstrapable.
pbuilder calls debootstrap to create chroots, debootstrap will unpack and configure base Debian packages; I suspect debootstrap is failing due to a bug in some Debian package in sid. For instance this could be due to http:// bugs.debian. org/cgi- bin/bugreport. cgi?bug= 581420.
Try running "sudo debootstrap sid rootfs", you should see the actual failure in rootfs/ debootstrap. log.
Please report bugs related to debootstrap failing against Debian, there's nothing we can fix on the Ubuntu side of things to make Debian debootstrapable.