kde4@debian:~$ schroot -u root
W: line 77 [experimental]: Unknown key ‘mount-options’ used
I: This option may be present in a newer version
W: Group ‘sbuild’ not found
Password:
mount: unknown filesystem type 'sys'
E: experimental-897da7a4-7eb6-4f8f-9b84-427181dcea37: Chroot setup failed: stage=setup-start