sandboxctl on 10.1/amd64 ?

[Andrew Randrianasulu <randrianasulu%gmail.com@localhost>]

I tried to use sandboxctl on 10.1_stable/amd64 host for creating 9.0 amd64 chroot

using this guide:

https://washbear.neocities.org/wine-sandbox

mcedit /usr/pkg/etc/sandboxctl/netbsd9.conf

SANDBOX_TYPE=netbsd-release

SANDBOX_ROOT="/root/chroot/netbsd9-amd64"

                                                                                                   NETBSD_RELEASE_RELEASEDIR="/home/guest/sandboxes/netbsd-9-amd64/"

NETBSD_RELEASE_SETS="base etc comp text"

but when I try:

netbsd10# sandboxctl -v -c netbsd9 create                                                         

 sandboxctl: D: Extracting /home/guest/sandboxes/netbsd-9-amd64//binary/sets/base.tar.xz into /root/chroot/netbsd9-amd64                                                                              

 sandboxctl: D: Extracting /home/guest/sandboxes/netbsd-9-amd64//binary/sets/etc.tar.xz into /root/chroot/netbsd9-amd64                                                                              

  sandboxctl: D: Extracting /home/guest/sandboxes/netbsd-9-amd64//binary/sets/comp.tar.xz into /root/chroot/netbsd9-amd64                                                                              

 sandboxctl: D: Extracting /home/guest/sandboxes/netbsd-9-amd64//binary/sets/text.tar.xz into /root/chroot/netbsd9-amd64                                                                              

 sandboxctl: D: Creating device nodes                                                              

 sandboxctl: E: Failed to create sandbox type netbsd-release

ow. What exactly is missing?

pkgin says everything up to date, I updated system with sysinst to March, 4 binaries (latest on amd64)