return dir, err
	}

	// Check if a .ziphash file exists. It should be created before the
	// zip is extracted, but if it was deleted (by another program?), we need
	// to re-calculate it. Note that checkMod will repopulate the ziphash
	// file if it doesn't exist, but if the module is excluded by checks
	// through GONOSUMDB or GOPRIVATE, that check and repopulation won't happen.
	ziphashPath, err := CachePath(ctx, m, "ziphash")