{
  "header" : ["stable (3.1.0)", "nightly"],
  "stable" : {
    "mac" : [
      {
        "package" : "homebrew",
        "language" : "python",
        "cmd" : ["1", "2"]
      },
      {
        "package" : "conda",
        "language" : "python",
        "cmd" : ["3", "4"]
      },
      {
        "package" : "pip",
        "language" : "python",
        "cmd" : ["5", "6"]
      },
      {
        "package" : "source",
        "language" : "python",
        "cmd" : ["7", "8"]
      },
      {
        "package" : "macports",
        "language" : "R",
        "cmd" : ["9", "10"]
      }
    ]
  }
}