gemパッケージの「-60」

gemを0.9.5にしたらプラットフォームごとのファイル名の命名規則が変わったらしく、「rua-0.3.7-x86-mswin32-60.gem」というファイル名になってしまった。
x86はともかく、末尾の「60」がよくわからないのでplatform.rbを覗く。

  ##
  # A pure-ruby gem that may use Gem::Specification#extensions to build
  # binary files.

  RUBY = 'ruby'

  ##
  # A platform-specific gem that is built for the packaging ruby's platform.
  # This will be replaced with Gem::Platform::local.

  CURRENT = 'current'

  ##
  # A One Click Installer-compatible gem, built with VC6 for 32 bit Windows.
  #
  # CURRENT is preferred over this constant, avoid its use at all costs.

  MSWIN32 = new ['x86', 'mswin32', '60']

  ##
  # An x86 Linux-compatible gem
  #
  # CURRENT is preferred over this constant, avoid its use at all costs.

  X86_LINUX = new ['x86', 'linux', nil]

  ##
  # A PowerPC Darwin-compatible gem
  #
  # CURRENT is preferred over this constant, avoid its use at all costs.

  PPC_DARWIN = new ['ppc', 'darwin', nil]

  # :stopdoc:
  # Here lie legacy constants.  These are deprecated.
  WIN32 = 'mswin32'
  LINUX_586 = 'i586-linux'
  DARWIN = 'powerpc-darwin'
  # :startdoc:

VC6の60かな?

追記

と思ったら、すでに1.0.1がリリースされてる…。
こっちだと、末尾の「-60」はなくなったっぽいなぁ。