@Duncaen Thanks for the tip. Would it be possible to add this to the usage message?
Something line:
```
Usage: xbps-uchroot [-b src:dest] [-O -t -o <opts>] <dir> [--] <cmd> [<cmdargs>]
```
This could be of some help to people not used to this convention. For instance, Arch Linux's `arch-chroot` does *not* support `--` to separate command and cmdargs from its own options.