/mnt is reserved for sysadmin mount.

If it is used for sysadmin mount of a DVD ISO image, zypper up fails:


(  6/315) Instaluje se: filesystem-13.3-13.1.x86_64
..........................................................................[chyba]
Instalace filesystem-13.3-13.1.x86_64 selhala:
Chyba: Subprocess failed. Error: RPM selhalo: error: unpacking of archive
failed on file /mnt: cpio: chmod
error: filesystem-13.3-13.1.x86_64: install failed
error: filesystem-13.3-12.1.x86_64: erase skipped


(A) P��eru��it, (R) opakovat, (I) ignorovat? [a/r/i] (a): r

I think that use of %ghost %dir and safe creation by mkdir /mnt 2>/dev/null ||:
in %post could work (at cost of Requires(post): coreutils).