./archbootstrap /var/lib/vservers/archlinux/
archbootstrap 0.4
Using existing pkg cache...
Fetching http://darkstar.ist.utl.pt/archlinux//current/os/i686/setup/pacman.pkg.tar.gz.
Fetching http://darkstar.ist.utl.pt/archlinux//current/os/i686/setup/packages.txt.
Fetching http://darkstar.ist.utl.pt/archlinux//current/os/i686/glibc-2.6-2.pkg.tar.gz.
warning: cannot find chroot binary - unable to run scriptlets
loading package data... done.
error: unsatisfied dependencies:
  glibc: requires kernel-headers>=2.6.21.1

Error: Could not add a package.