anacron should create /var/spool/anacron. /var/log/messages reads: Can't chdir to /var/spool/anacron Reproducible: Always Steps to Reproduce: 1. 2. 3.
Are you still experiencing this problem? I cannot reproduce it here and /var/spool/anacron does get created by the ebuild (via dodir). It also could be a permissions problem, as the error you posted doesn't necessarily mean that the directory doesn't exist. Please provide some more information.
Sorry, have not installed Gentoo on my testing machine at the moment, so I can't test. :(
If/when you get a chance to test, and you run into this problem again, please re-open this bug ; closing as NEEDINFO for now.
Will do, but don't know when I have time. :)