title: Angular : ng build fails but npm run build works fine
body: <p>Inside my Angular 5 app , i ve <code>angular-cli 1.6.8</code></p>
  
  <pre><code>{
    "name": "test",
    "version": "0.0.0",
    "license": "MIT",
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "build": "ng build",
      "karma": "ng test",
      "test": "jest",
      "test:watch": "jest --watch",
      "test:ci": "jest --runInBand",
      "lint": "ng lint",
      "e2e": "ng e2e"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "^5.2.7",
      "@angular/common": "^5.2.7",
      "@angular/compiler": "^5.2.7",
      "@angular/core": "^5.2.7",
      "@angular/forms": "^5.2.7",
      "@angular/http": "^5.2.7",
      "@angular/platform-browser": "^5.2.7",
      "@angular/platform-browser-dynamic": "^5.2.7",
      "@angular/platform-server": "^5.2.7",
      "@angular/router": "^5.2.7",
      "bootstrap": "^3.3.7",
      "core-js": "^2.4.1",
      "font-awesome": "^4.7.0",
      "hammerjs": "^2.0.8",
      "lodash": "^4.12.0",
      "moment": "^2.18.1",
      "npm": "^5.2.0",
      "proxy-polyfill": "^0.1.7",
      "rxjs": "^5.5.6",
      "sha1": "^1.1.1",
      "smoothscroll-polyfill": "^0.3.5",
      "web-animations-js": "^2.2.5",
      "zone.js": "^0.8.8"
    },
    "devDependencies": {
      "@angular/cli": "1.6.8",
      "@angular/compiler-cli": "^5.2.7",
      "@types/jasmine": "2.5.38",
      "@types/jest": "^20.0.5",
      "@types/node": "~6.0.60",
      "codelyzer": "~2.0.0",
      "jasmine-core": "~2.5.2",
      "jasmine-spec-reporter": "~3.2.0",
      "jest": "^20.0.4",
      "karma": "~1.4.1",
      "karma-chrome-launcher": "~2.0.0",
      "karma-cli": "~1.0.1",
      "karma-coverage-istanbul-reporter": "^0.2.0",
      "karma-jasmine": "~1.1.0",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.1.0",
      "ts-jest": "^20.0.7",
      "ts-node": "~2.0.0",
      "tslint": "~4.5.0",
      "typescript": "2.6.2"
    },
  }
  </code></pre>
  
  <p>when running ng --version or ng build inside my app folder , it fails saying that : <code>bash: ng: command not found</code>  -> in contrats running <code>npm run build</code> runs normally</p>
  
  <p>i ve <strong>node 8.0.0</strong> and <strong>npm 4.2.2</strong> installed globally , buti ve not <strong>angular-cli</strong> installed globally , and i don't want to install it. therfore i think that i may use ng commands inside my app (locally) , no ?</p>
  
  <p>if not how may i do it without installing it globally via <code>npm install -g @angular/cli</code>  <strong>(as i m not allowed to run global npm install actions)</strong></p>
  
  <p>Sugesstions?</p>