https://help.ubuntu.com/community/BasicChroot

You don't have to enter the chroot shell to access its commands. Suppose you want to run Firefox in a chroot jail in order to avoid security problems with signed Java applets and other components which otherwise would have access to your personal files. You can do this by running the command sudo chroot /var/chroot firefox -DISPLAY=:0.0

I use /var/chroot as the jailed RFS, use sudo chroot /var/chroot to enter the jail.

Cross Compile in chroot

Can run into known problems with libudev, needed for applications that want to speak to USB drivers and enumerate devices. Pointers here: https://github.com/microsoft/WSL/issues/143