yarn-error.log

Arguments: 
  /Users/ezhilvendhan/.nvm/versions/node/v6.9.2/bin/node /usr/local/Cellar/yarn/1.0.2/libexec/bin/yarn.js install

PATH: 
  /Users/ezhilvendhan/.nvm/versions/node/v6.9.2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin:/Library/Frameworks/GDAL.framework/Programs:/Users/ezhilvendhan/go/bin:/Users/ezhilvendhan/Dev/bin

Yarn version: 
  1.0.2

Node version: 
  6.9.2

Platform: 
  darwin x64

npm manifest: 
  {
      "name": "og-fouling-forecast",
      "author": "General Electric",
      "description": "A Px component",
      "version": "0.0.1",
      "private": true,
      "extName" : null,
      "repository" :
      {
          "type": "git",
          "url": "https://github.com/PredixDev/og-fouling-forecast.git"
      },
      "homepage": "http://predix.io/",
      "devDependencies": {
        "browser-sync": "^2.13.0",
        "gulp": "^3.9.1",
        "gulp-autoprefixer": "^3.1.0",
        "gulp-bump": "^2.4.0",
        "gulp-cached": "^1.1.1",
        "gulp-clean": "^0.3.2",
        "gulp-concat": "^2.6.0",
        "gulp-cssmin": "^0.1.7",
        "gulp-if": "^2.0.1",
        "gulp-load-plugins": "^1.2.4",
        "gulp-match": "^1.0.2",
        "gulp-rename": "^1.2.2",
        "gulp-sass": "^2.3.2",
        "gulp-sequence": "^0.4.5",
        "gulp-sourcemaps": "^2.4.1",
        "gulp-style-modules": "^0.1.0",
        "node-sass-import-once": "^1.2.0",
        "stream-combiner2": "^1.1.1",
        "yargs": "^6.0.0",
        "polymer-cli": "^1.0.0"
      }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile

Trace: 
  Error: unable to get local issuer certificate
      at Error (native)
      at TLSSocket.<anonymous> (_tls_wrap.js:1079:38)
      at emitNone (events.js:86:13)
      at TLSSocket.emit (events.js:185:7)
      at TLSSocket._finishInit (_tls_wrap.js:603:8)
      at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:433:38)