prebuilt configurations for docker-rpm-builder
If you get an error related to cap_set_files (or other capabilities issue) when using one of this images, it's an issue with the aufs driver of docker; you should switch to btrfs or devicemapper backend.
There's nothing I can do about that right now, the issue is there in upstream images as well.
The yum-builddep has been hacked since the original one in Centos 5 doesn't work with bare specfiles. It should work, but can occasionally do something strange.