yarn-error.log

Arguments: 
  /Users/ozer/.nvm/versions/node/v5.1.0/bin/node /usr/local/bin/yarn

PATH: 
  /Users/ozer/.nvm/versions/node/v5.1.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/Ghostscript/bin:/opt/X11/bin:/opt/ImageMagick/bin

Yarn version: 
  0.20.0

Node version: 
  5.1.0

Platform: 
  darwin x64

npm manifest: 
  {
    "private": true,
    "engines": {
      "node": ">=4"
    },
    "devDependencies": {
      "babel-core": "^6.4.0",
      "babel-preset-es2015": "^6.3.13",
      "babel-register": "^6.5.2",
      "browser-sync": "^2.2.1",
      "del": "^2.2.0",
      "gulp": "^3.9.1",
      "gulp-autoprefixer": "^3.0.1",
      "gulp-babel": "^6.1.1",
      "gulp-cache": "^0.4.2",
      "gulp-cssnano": "^2.0.0",
      "gulp-eslint": "^3.0.0",
      "gulp-filter": "^4.0.0",
      "gulp-htmlmin": "^3.0.0",
      "gulp-if": "^2.0.2",
      "gulp-imagemin": "^3.0.1",
      "gulp-load-plugins": "^1.2.4",
      "gulp-plumber": "^1.0.1",
      "gulp-sass": "^2.0.0",
      "gulp-size": "^2.1.0",
      "gulp-sourcemaps": "^2.2.0",
      "gulp-uglify": "^2.0.0",
      "gulp-useref": "^3.0.0",
      "main-bower-files": "^2.5.0",
      "run-sequence": "^1.2.2",
      "wiredep": "^4.0.0"
    },
    "eslintConfig": {
      "env": {
        "es6": true,
        "node": true,
        "browser": true
      },
      "rules": {
        "quotes": [
          2,
          "single"
        ]
      }
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile

Trace: 
  Error: https://registry.yarnpkg.com/babel-preset-es2015: tunneling socket could not be established, cause=getaddrinfo ENOTFOUND proxy2.ibb.gov.tr proxy2.ibb.gov.tr:8080
      at ClientRequest.onError (/usr/local/Cellar/yarn/0.20.0/libexec/lib/node_modules/yarn/node_modules/tunnel-agent/index.js:176:17)
      at ClientRequest.g (events.js:260:16)
      at emitOne (events.js:77:13)
      at ClientRequest.emit (events.js:169:7)
      at Socket.socketErrorListener (_http_client.js:265:9)
      at emitOne (events.js:77:13)
      at Socket.emit (events.js:169:7)
      at connectErrorNT (net.js:996:8)
      at doNTCallback2 (node.js:452:9)
      at process._tickCallback (node.js:366:17)