anchor.diff:    devel do
       version "$devVersion"
       if OS.mac?
  -      if Hardware::CPU.is_64_bit?
  -        url "$_urlBase/dev/release/${revisions['dev']}/${_x64Files['mac']}"
  -        sha256 "${hashes['dev'][_x64Files['mac']]}"
  -      else
  -        url "$_urlBase/dev/release/${revisions['dev']}/${_ia32Files['mac']}"
  -        sha256 "${hashes['dev'][_ia32Files['mac']]}"
  -      end
  +      url "$_urlBase/dev/release/${revisions['dev']}/${_x64Files['mac']}"
  +      sha256 "${hashes['dev'][_x64Files['mac']]}"
       elsif OS.linux? && Hardware::CPU.intel?
         if Hardware::CPU.is_64_bit?
           url "$_urlBase/dev/release/${revisions['dev']}/${_x64Files['linux']}"
  
positive.code:   'linux-arm': 'sdk/dartsdk-linux-arm64-release.zip',
  };
  const _ia32Files = {
    'mac': 'sdk/dartsdk-macos-ia32-release.zip',
    'linux': 'sdk/dartsdk-linux-ia32-release.zip',
    'linux-arm': 'sdk/dartsdk-linux-arm-release.zip',
  };
  
negative.code: 
    version "$stableVersion"
    if OS.mac?
      url "$_urlBase/stable/release/${revisions['stable']}/${_x64Files['mac']}"
      sha256 "${hashes['stable'][_x64Files['mac']]}"
    elsif OS.linux? && Hardware::CPU.intel?
      if Hardware::CPU.is_64_bit?
        url "$_urlBase/stable/release/${revisions['stable']}/${_x64Files['linux']}"
  