// Load cached coverage meta-data file fragment, but only if we're
	// skipping the main build (cachedBuild==true).
	if cachedBuild && need&needCovMetaFile != 0 {
		bact := a.Actor.(*buildActor)
		if err := b.loadCachedObjdirFile(a, cache.Default(), bact.covMetaFileName); err == nil {
			need &^= needCovMetaFile
		}
	}

	// Load cached vet config, but only if that's all we have left
	// (need == needVet, not testing just the one bit).