Comment 33 for bug 1243642

not an X bug, reassigning

and my use case for getting "<|>" on an US layout is actually already available via altgr-shift-{8,9,i}, so I don't need hacks anymore

but I think you can drop your custom layouts in /etc/X11/xkb(/symbols?), clean up the cache in /var/lib/xkb and restart the server.. maybe it'll show up in the gui then