title: You seem to not be depending on "@angular/core and/or "rxjs". This is an error
body: <p>I am having issue with the nodejs. It's because I tried to migrate from angular 5 to 6, But failed. So, I cannot be able to run or build my project using nodejs. Is there any fix for this issue will be helpful</p>
  
  <p>When I tried to install my npm running the following command:</p>
  
  <pre><code>npm install
  </code></pre>
  
  <p>I am getting this error:</p>
  
  <pre><code>npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\js-yaml-cb078df5\dist\js-yaml.min.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\mime-f1f903d1\build\build.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\mime-f1f903d1\build\test.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\constants.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\framer.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\index.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\parser.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\scheduler.js'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\spdy-transport-91ae40ff\lib\spdy-transport\protocol\base\utils.js'
  npm WARN tar ENOENT: no such file or directory, lstat 'F:\myapp\node_modules\.staging\clean-css-7b0fe6ee\lib\optimizer\level-2\properties'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-10-keyword.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-10-keyword.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-11-operation.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-11-operation.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-12-quoted.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-12-quoted.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-13-selector.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-13-selector.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-14-url.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-14-url.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-15-value.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-15-value.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-3-assignment.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-3-assignment.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-4-call.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-4-call.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-5-color-2.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-5-color-2.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-5-color.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-5-color.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-6-condition.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-6-condition.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-7-dimension.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-7-dimension.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-8-element.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-8-element.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-9-expression.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\functions-9-expression.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-malformed.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-malformed.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-missing.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-missing.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-no-semi.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-no-semi.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-subfolder1.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-subfolder1.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-subfolder2.less'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\less-c0c4bd4e\test\less\errors\import-subfolder2.txt'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\node-sass-f213465e\src\libsass\src\values.cpp'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\node-sass-f213465e\src\libsass\src\util.hpp'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\node-sass-f213465e\src\libsass\src\values.hpp'
  npm WARN tar ENOENT: no such file or directory, open 'F:\myapp\node_modules\.staging\node-sass-f213465e\src\sass_types\value.h'
  npm WARN optional SKIPPING OPTIONAL DEPENDENCY: right-align@0.1.3 (node_modules\right-align):
  npm WARN enoent SKIPPING OPTIONAL DEPENDENCY: ENOENT: Cannot cd into 'F:\myapp\node_modules\.staging\right-align-7384ea42'
  
  npm ERR! code EINTEGRITY
  npm ERR! sha1-If1bBZdltIyYI+Bc/kcMzdgW6LE= integrity checksum failed when using sha1: wanted sha1-If1bBZdltIyYI+Bc/kcMzdgW6LE= but got sha1-8FZUYK0JFXYydrTJV8KmuPo186I=. (111478 bytes)
  npm WARN tar ENOENT: no such file or directory, lstat 'F:\myapp\node_modules\.staging\@angular\common-3ad65df7\esm2015\http\testing'
  </code></pre>
  
  <p>And also when I run the following command:</p>
  
  <pre><code>npm start
  </code></pre>
  
  <p>I have another error:</p>
  
  <pre><code>&gt; myapp@0.0.0 start F:\myapp
  &gt; ng serve
  
  Could not find module "@angular-devkit/build-angular" from "F:\\myapp".
  Error: Could not find module "@angular-devkit/build-angular" from "F:\\myapp".
      at Object.resolve (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\@angular-devkit\core\node\resolve.js:141:11)
      at Observable.rxjs_1.Observable [as _subscribe] (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\@angular-devkit\architect\src\architect.js:132:40)
      at Observable.subscribe (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\Observable.js:162:69)
      at DoOperator.call (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\operators\tap.js:71:23)
      at Observable.subscribe (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\Observable.js:159:22)
      at C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\util\subscribeTo.js:22:31
      at Object.subscribeToResult (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\util\subscribeToResult.js:7:45)
      at MergeMapSubscriber._innerSub (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:132:38)
      at MergeMapSubscriber._tryNext (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:129:14)
      at MergeMapSubscriber._next (C:\Users\Kousic\AppData\Roaming\npm\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:112:18)
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! myapp@0.0.0 start: `ng serve`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the myapp@0.0.0 start script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     C:\Users\Kousic\AppData\Roaming\npm-cache\_logs\2018-05-15T11_01_47_585Z-debug.log
  </code></pre>
  
  <p>This is my <code>package.json:</code></p>
  
  <pre><code>    {
    "name": "myapp",
    "version": "0.0.0",
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "build": "ng build",
      "test": "ng test",
      "lint": "ng lint",
      "e2e": "ng e2e"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "^6.0.0",
      "@angular/common": "^6.0.0",
      "@angular/compiler": "^6.0.0",
      "@angular/core": "^6.0.0",
      "@angular/forms": "^6.0.0",
      "@angular/http": "^6.0.0",
      "@angular/platform-browser": "^6.0.0",
      "@angular/platform-browser-dynamic": "^6.0.0",
      "@angular/router": "^6.0.0",
      "core-js": "^2.5.4",
      "rxjs": "^6.0.0",
      "zone.js": "^0.8.26"
    },
    "devDependencies": {
      "@angular-devkit/build-angular": "^0.6.1",
      "@angular/cli": "~6.0.1",
      "@angular/compiler-cli": "^6.0.0",
      "@angular/language-service": "^6.0.0",
      "@types/jasmine": "~2.8.6",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~8.9.4",
      "codelyzer": "~4.2.1",
      "jasmine-core": "~2.99.1",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~1.7.1",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "~1.4.2",
      "karma-jasmine": "~1.1.1",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.3.0",
      "ts-node": "~5.0.1",
      "tslint": "~5.9.1",
      "typescript": "~2.7.2"
    }
  }
  </code></pre>