do all checks at build time, with ourselves
abort with "Aborting release" if in the release phase
tell the user why the build/release process appears to hang here
this option is not needed
Dist-Zilla-Plugin-PromptIfStale-0.006

          - diagnostic message added before checks begin, so the user isn't
            wondering why the build/release appears to hang (querying the
            index can take a little bit of time if there are a lot of modules
            to check)