title: react-native run-ios takes forever to build and sometimes never does
body: <p>I start my app with react-native run-ios and i get left at this portion of the build process, sometimes indefinitely. why does this happen? </p>
  
  <p>Alexs-MBP:swig_app alexhome$ react-native run-ios
  Found Xcode project swig_app.xcodeproj
  Building using "xcodebuild -project swig_app.xcodeproj -configuration Debug -scheme swig_app -destination id=C46C9065-C23A-4118-AB00-5957B64086B1 -derivedDataPath build"
  User defaults from command line:</p>
  
  <pre><code>IDEDerivedDataPathOverride = /Users/alexhome/Desktop/swig_app/ios/build
  </code></pre>
  
  <p>Ive tried all the usual cleaning commands such as watchman watch-del-all and virtuall ever other cache cleaning command there is. sometimes the make it worse tho</p>
  
  <p>package.Json:</p>
  
  <p>{
    "name": "swig_app",
    "version": "0.0.1",
    "private": true,
    "scripts": {
      "start": "node node_modules/react-native/local-cli/cli.js start",
      "test": "jest"
    },
    "dependencies": {
      "react": "16.6.3",
      "react-native": "0.57.8",
      "react-native-router-flux": "^4.0.6",
      "react-redux": "^6.0.0",
      "redux": "^4.0.1"
    },
    "devDependencies": {
      "babel-jest": "23.6.0",
      "jest": "23.6.0",
      "metro-react-native-babel-preset": "0.51.1",
      "react-test-renderer": "16.6.3"
    },
    "jest": {
      "preset": "react-native"
    }
  }</p>