Those of you using the automated build functionality of docker's hub may have been experiencing some build failures lately. It appears that docker has migrated to something using a different graph driver on the back-end or have otherwise limited the capabilities available during the build process.

The result is that builds with packages like httpd will fail, because they require the cap_set_file privilege as part of the install process. There have been a few bugs filed with the Docker folks for this, but I don't know what the end result of this will be. For now, if you use the automated build framework on dockerhub, be aware that your builds may fail, and it's outside our control.