It wasn't the only reason, but part of why this failed: CocoaPods/Specs#5480
And why, when I pulled down his repo, I couldn't find the pod spec on a pod install until I mkdir && mv.
This is partially implemented here: https://github.com/CocoaPods/Core/blob/master/lib/cocoapods-core/source/health_reporter.rb#L112-L132
Low priority for now: not sure how this passes the linter. I'll see if I can write a test at some point.
@davelyon closed with reason "Already fixed in: CocoaPods/Core@8edbb21"