Shouldn't /var/run and /var/run/lock point to absolute paths?

I have a setup with my 'var' on a separate partition that causes /var/run and /var/run/lock to point to nothing each time I upgrade the filesystem package and I wonder if this is a bug.
Mounted at /mnt/data is a luks encrypted partion where I keep my home and var as subdirectories. Two symlinks point to them from root:
# ls -al /
lrwxrwxrwx 1 root root 14 Apr 21 2011 home -> /mnt/data/home
lrwxrwxrwx 1 root root 13 Apr 21 2011 var -> /mnt/data/var
Each time I upgrade the filesystems package however I end up with /var/run and /var/lock pointing to '../run' and ../run/lock', which in my case are the non-existing /mnt/data/run and /mnt/data/run/lock. I have to delete the symlinks and make them link to the absolute /run and /run/lock. Is there a reason the symlinks are relative instead of absolute?
[edit]
(this should have been posted in 'Pacman & Package Upgrade Issues' instead of here.)
[edit]
Last edited by rwd (2012-06-24 18:14:08)

Thanks! After using bind mounts and reinstalling the filesystems package the relative links work. Still I wonder why using bind mounts instead of symlinks is the 'correct' way. The only advantage I see is to have the ability to use mount options, which In my case I don't need.

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