This is not as serious as I thought because symbolic links in /usr/ccs/bin point to correspondent tools in /usr/bin.

http://blogs.sun.com/damico/entry/the_death_of_usr_ccs

> --- http://blogs.sun.com/rie/entry/we_ve_moved_code_usr ---
> We've moved - /usr/ccs/bin commands, that is 
> 
> A recent update to Solaris Nevada (build 68 to be precise) has moved the /usr/ccs/bin utilities to /usr/bin. This move includes the link-editor, and associated utilities. 
> --- end ---
> 
> I remember I had trouble using pkgsrc on Nexenta GNU/OpenSolaris an year or so ago and one reason was missing /usr/ccs/bin directory. I'm sure (as a former user of solaris production system) that even many years after this change old versions of solaris will be still around. Pkgsrc developers have to support both locations.
> --
> Alexander Nasonov