old_contents: {
    "targets": [
      {
        "include_dirs": [
          "<!(node -e \"require('nan')\")",
          "include"
        ],
        "target_name": "addon",
        "sources": [
          "./src/addon.cpp"
        ]
      }
    ]
  }
  
new_contents: {
    "targets": [
      {
        "target_name": "addon",
        "link_settings": {
          "libraries": [
            "<!@(make libraries -s)"
          ]
        },
        "include_dirs": [
          "<!(node -e \"require('nan')\")",
          "include"
        ],
        "sources": [
          "./src/addon.cpp"
        ]
      }
    ]
  }
  
subject: Add linked libraries