npm sigar@0.0.2 failure

[ysstech]

`
sh: node-waf: command not found
sh: node-waf: command not found
npm WARN test@0.1.0 No repository field.
npm WARN test@0.1.0 No license field.
npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/bin/npm-cli.js" "update"
npm ERR! node v7.6.0
npm ERR! npm v4.3.0
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn

npm ERR! sigar@0.0.2 preinstall: node-waf clean || (exit 0); node-waf configure build
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the sigar@0.0.2 preinstall script 'node-waf clean || (exit 0); node-waf configure build'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the sigar package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node-waf clean || (exit 0); node-waf configure build
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs sigar
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls sigar
npm ERR! There is likely additional logging output above.`

[wdavidw]

This package was developed and tested against an old version of Node.js. I dont have the time to update it, feel free to contribute.