lib/omnibus/build_version_dsl.rb
def maybe_append_timestamp(version)
      if Config.append_timestamp && !has_timestamp?(version)
        [version, Omnibus::BuildVersion.build_start_time].join("+")
      else
        version
      end
    end
def maybe_append_timestamp(version)
      if Config.append_timestamp && !has_timestamp?(version)
        [version, Omnibus::BuildVersion.build_start_time].join("+")
      else
        version
      end
    end
Append the build_start_time to the given string if
 Config.append_timestamp is true

 @param [String] version
 @return [String]