As of today, CheckPackageInstalls refuses to install when using --no-build. But given also the --prebuilt option, it makes perfect sense to check if the provided package installs.

When developing, it's not uncommon to depend on new versions of packages not yet available for mock and yum. Sometimes they are in updates-testing, and then it's possible to hack a new mock configuration file.

However, a much better solution would be if it was possible to define e. g. a directory containing rpm files to be installed together with the reviewed RPM. This would speed up things in these situations.