# File lib/fpm/package/rpm.rb, line 587
  def to_s(format=nil)
    if format.nil?
      format = if attributes[:rpm_dist]
        "NAME-VERSION-ITERATION.DIST.ARCH.EXTENSION"
      else
        "NAME-VERSION-ITERATION.ARCH.EXTENSION"
      end
    end
    return super(format.gsub("DIST", to_s_dist))
  end