title: Aot ng build in Angular 4
body: <p>I have some problem with my compilation aot in angular 4, this is my package.json: </p>
  
  <pre><code>  "dependencies": {
      "@agm/core": "1.0.0-beta.0",
      "@angular/animations": "4.4.6",
      "@angular/common": "4.4.6",
      "@angular/compiler": "4.4.6",
      "@angular/compiler-cli": "4.4.6",
      "@angular/core": "4.4.6",
      "@angular/forms": "4.4.6",
      "@angular/http": "4.4.6",
      "@angular/platform-browser": "4.4.6",
      "@angular/platform-browser-dynamic": "4.4.6",
      "@angular/platform-server": "4.4.6",
      "@angular/router": "4.4.6",
      "@types/iban": "0.0.28",
      "core-js": "2.4.1",
      "dialog-polyfill": "0.4.7",
      "enhanced-resolve": "3.3.0",
      "font-awesome": "4.7.0",
      "iban": "0.0.8",
      "material-design-lite": "1.3.0",
      "modernizr": "3.5.0",
      "moment": "2.18.1",
      "raven-js": "3.12.1",
      "rxjs": "5.0.1",
      "ts-helpers": "1.1.1",
      "typescript": "^2.3.4",
      "web-animations-js": "2.2.2",
      "zone.js": "^0.8.4"
    },
  
        "devDependencies": {
          "@angular/cli": "^1.4.9",
          "@angular/compiler-cli": "4.4.6",
          "@ngtools/webpack": "1.7.4",
          "@angular/language-service": "4.4.6",
          "@types/core-js": "0.9.35",
          "@types/jasmine": "2.5.38",
          "@types/node": "6.0.42",
          "chai": "3.5.0",
          "chai-as-promised": "6.0.0",
          "chai-colors": "1.0.1",
          "codelyzer": "~2.0.0-beta.1",
          "compodoc": "0.0.32",
          "cucumber": "1.3.3",
          "cucumber-assert": "2.0.0",
          "cucumber-html-report": "0.5.9",
          "cucumber-junit-reporter": "git://github.com/davidparsson/cucumber-junit-reporter.git",
          "cucumberjs-junitxml": "1.0.0",
          "jasmine-core": "2.5.2",
          "jasmine-spec-reporter": "2.5.0",
          "karma": "1.2.0",
          "karma-chrome-launcher": "2.0.0",
          "karma-cli": "1.0.1",
          "karma-firefox-launcher": "1.0.1",
          "karma-jasmine": "1.0.2",
          "karma-phantomjs-launcher": "1.0.4",
          "karma-remap-istanbul": "0.2.1",
          "protractor": "~5.1.2",
          "protractor-cucumber-framework": "3.1.0",
          "ts-node": "1.2.1",
          "tslint": "4.0.2",
          "typescript": "^2.1.5"
        }
  </code></pre>
  
  <p>When I launch the command "ng build --aot" I had this error: </p>
  
  <pre><code>looking for modules in /Users/raph/app/project/src
              using description file: /Users/raph/app/project/package.json (relative path: ./src)
                Field 'browser' doesn't contain a valid alias configuration
              after using description file: /Users/raph/app/project/package.json (relative path: ./src)
                using description file: /Users/raph/app/project/package.json (relative path: ./src/@angular/router/testing/src/router_testing_module)
                  no extension
                    Field 'browser' doesn't contain a valid alias configuration
                    /Users/raph/app/project/src/@angular/router/testing/src/router_testing_module doesn't exist
                  .ts
                    Field 'browser' doesn't contain a valid alias configuration
                    /Users/raph/app/project/src/@angular/router/testing/src/router_testing_module.ts doesn't exist
                  .js
                    Field 'browser' doesn't contain a valid alias configuration
                    /Users/raph/app/project/src/@angular/router/testing/src/router_testing_module.js doesn't exist
                  as directory
                    /Users/raph/app/project/src/@angular/router/testing/src/router_testing_module doesn't exist
      [/Users/raph/app/project/src/$$_gendir/app/core-module/node_modules]
      [/Users/raph/app/project/src/$$_gendir/app/node_modules]
      [/Users/raph/app/project/src/node_modules]
      [/Users/raph/app/node_modules]
      [/Users/raph/node_modules]
      [/Users/node_modules]
      [/node_modules]
      [/Users/raph/app/project/node_modules/@angular/router/testing/src/router_testing_module]
      [/Users/raph/app/project/node_modules/@angular/router/testing/src/router_testing_module.ts]
      [/Users/raph/app/project/node_modules/@angular/router/testing/src/router_testing_module.js]
      [/Users/raph/app/webapp/node_modules/@angular/router/testing/src/router_testing_module]
  </code></pre>
  
  <p>Maybe this is a problem with my configuration in my package.json or an include in my file , I can't find something when I try to debug.</p>
  
  <p>This error is only present when I build with AOT mode.</p>