How do I disable udevd in systemd?

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http://unix.stackexchange.com – I'm trying to boot a Fedora rawhide LXC container from a Fedora 16 host, and it's not working - systemd just keeps dropping into emergency mode. Because udevd doesn't work in LXC containers, I thought I'd try disabling udevd inside the guest, but I can't manage to do this. You'd think that systemd disable udevd.service would do the trick, but it doesn't. I can see that udevd is still being spawned by running pstree in the host. (HowTos)