[rkeene2]

As an alternative, one can also use User Mode Linux (UML) to implement a pretty fancy chroot (and fakeroot).

It can do a few things userns can't, like load kernel modules. I've had to use this to deal with bugs in BtrFS before.

[gunapologist99]

I love UML. I used to use it all the time. Is it still developed? It was really a pretty slick system and very easy to work with.

http://user-mode-linux.sourceforge.net/

(another good site: https://wiki.archlinux.org/title/User-mode_Linux )

[kasabali]

It's in mainline kernel (can be compiled as an architecture), but I don't think it's being actively developed.