In order for certain programs to function properly, the proc file system must be mounted and available from within the chroot'ed environment as well. It's not a problem to mount the proc file system (or any other file system for that matter) twice or even more than that. The proc file system is mounted under $LFS/proc by running the following command. Note that we don't use the $LFS variable because we are now in chroot. mount proc /proc -t proc