new_contents: {
    "targets": [
      {
        "target_name": "niagrad",
        "type": "executable",
        "sources": [ "./tools/niagrad/src/niagrad.c",
                     "./tools/niagrad/src/str.c" ],
        "include_dirs": [ "./tools/niagrad/src/" ],
      }
    ]
  }
subject: Add gyp binding