I can create symlink (something like that) and it works. Until next restart.
How do I force How do I preserve these after a system update?
iterm to restore symlinks?
Since you stated you just updated to Mavericks… that's the culprit. Doing an OS upgrade (or a reinstall of OS X) will overwrite system directories,
If you don't want your links changed, it's better to put them somewhere the OS will not overwrite, such as