Use distrobuilder to build a busybox but lxc-create failed

I use distrobuilder to build busybox successfully, my folder have busybox.yaml meta.tar.xz rootfs/ rootfs.tar.xz, then i use lxc-create -n busybox -t local -- -m meta.tar.xz -f rootfs.tar.xz to create a lxc container, but shell tell me

Unpacking the rootfs
ERROR: meta tarball is missing the configuration file
lxc-create: busybox: lxccontainer.c: create_run_template: 1627 Failed to create container from template
lxc-create: busybox: tools/lxc_create.c: main: 317 Failed to create container busybox

Can someone help me?