net-misc/apt-cacher-ng-0.8.0 triggers: * QA Notice: This ebuild installs into paths that should be created at runtime. * To fix, simply do not install into these directories. Instead, your package * should create dirs on the fly at runtime as needed via init scripts/etc... * * var/cache * var/cache/apt-cacher-ng apt-cacher-ng is a proxy that caches tons of files there. It shouldn't matter whether the package installs that directory or whether it's done at run-time. I have no idea how to begin to figure out why /var/cache/* shouldn't be a directory owned by a package. Why was this QA check added? Do we intend to introduce mechanisms that empty /var/cache?
bug 493154 contains documentation
*** This bug has been marked as a duplicate of bug 493154 ***