title: Could not find module "@angular-devkit/build-angular"
body: <p>After updating to Angular 6.0.1, I get the following error on <code>ng serve</code>:</p>
  
  <pre><code>Could not find module "@angular-devkit/build-angular" from "/home/Projects/myProjectName".
  Error: Could not find module "@angular-devkit/build-angular" from "/home/Projects/myProjectName".
      at Object.resolve (/home/Projects/myProjectName/node_modules/@angular-devkit/core/node/resolve.js:141:11)
      at Observable.rxjs_1.Observable [as _subscribe] (/home/Projects/myProjectName/node_modules/@angular-devkit/architect/src/architect.js:132:40)
  </code></pre>
  
  <p><code>ng update</code> says everything is in order. Deleting <code>node_modules</code> folder and a fresh <code>npm install</code> install did not help either. </p>
  
  <p>My project is based on <a href="https://github.com/akveo/ngx-admin" rel="noreferrer">ng2-admin(Angular4 version)</a>. Here is my package.json dependecies:</p>
  
  <pre><code> "dependencies": {
      "@angular/animations": "^6.0.1",
      "@angular/common": "^6.0.1",
      "@angular/compiler": "^6.0.1",
      "@angular/core": "^6.0.1",
      "@angular/forms": "^6.0.1",
      "@angular/http": "^6.0.1",
      "@angular/platform-browser": "^6.0.1",
      "@angular/platform-browser-dynamic": "^6.0.1",
      "@angular/platform-server": "^6.0.1",
      "@angular/router": "^6.0.1",
      "@ng-bootstrap/ng-bootstrap": "1.0.0-alpha.26",
      "@ngx-translate/core": "^10.0.1",
      "@ngx-translate/http-loader": "^3.0.1",
      "amcharts3": "github:amcharts/amcharts3",
      "ammap3": "github:amcharts/ammap3",
      "angular-table": "^1.0.4",
      "angular2-csv": "^0.2.5",
      "angular2-datatable": "0.6.0",
      "animate.css": "3.5.2",
      "bootstrap": "4.0.0-alpha.6",
      "bower": "^1.8.4",
      "chart.js": "1.1.1",
      "chartist": "0.10.1",
      "chroma-js": "1.3.3",
      "ckeditor": "4.6.2",
      "core-js": "2.4.1",
      "easy-pie-chart": "2.1.7",
      "font-awesome": "4.7.0",
      "fullcalendar": "3.3.1",
      "google-maps": "3.2.1",
      "ionicons": "2.0.1",
      "jquery": "3.2.1",
      "jquery-slimscroll": "1.3.8",
      "leaflet": "0.7.7",
      "leaflet-map": "0.2.1",
      "lodash": "4.17.4",
      "ng2-ckeditor": "1.1.6",
      "ng2-completer": "^1.6.3",
      "ng2-handsontable": "^2.1.0-rc.3",
      "ng2-slim-loading-bar": "^4.0.0",
      "ng2-smart-table": "^1.0.3",
      "ng2-tree": "2.0.0-alpha.5",
      "ngx-uploader": "4.2.4",
      "normalize.css": "6.0.0",
      "roboto-fontface": "0.7.0",
      "rxjs": "^6.1.0",
      "rxjs-compat": "^6.1.0",
      "zone.js": "0.8.26"
    },
    "devDependencies": {
      "@angular/cli": "^6.0.1",
      "@angular/compiler-cli": "^6.0.1",
      "@types/fullcalendar": "2.7.40",
      "@types/jasmine": "2.5.38",
      "@types/jquery": "2.0.41",
      "@types/jquery.slimscroll": "1.3.30",
      "@types/lodash": "4.14.61",
      "@types/node": "6.0.69",
      "codelyzer": "3.0.1",
      "gh-pages": "0.12.0",
      "jasmine-core": "2.5.2",
      "jasmine-spec-reporter": "3.2.0",
      "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",
      "npm-run-all": "4.0.2",
      "protractor": "5.1.0",
      "rimraf": "2.6.1",
      "standard-changelog": "1.0.1",
      "stylelint": "7.10.1",
      "ts-node": "2.1.2",
      "tslint": "5.2.0",
      "tslint-eslint-rules": "4.0.0",
      "tslint-language-service": "0.9.6",
      "typescript": "^2.7.2",
      "typogr": "0.6.6",
      "underscore": "1.8.3",
      "wintersmith": "2.2.5",
      "wintersmith-sassy": "1.1.0"
    }
  </code></pre>
  
  <p>and my angular.json:</p>
  
  <pre><code>{
    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
    "version": 1,
    "newProjectRoot": "projects",
    "projects": {
      "ng2-admin": {
        "root": "",
        "sourceRoot": "src",
        "projectType": "application",
        "architect": {
          "build": {
            "builder": "@angular-devkit/build-angular:browser",
            "options": {
              "outputPath": "dist",
              "index": "src/index.html",
              "main": "src/main.ts",
              "tsConfig": "src/tsconfig.app.json",
              "polyfills": "src/polyfills.ts",
              "assets": [
                "src/assets",
                "src/favicon.ico"
              ],
              "styles": [
                "node_modules/roboto-fontface/css/roboto/sass/roboto-fontface.scss",
                "node_modules/normalize.css/normalize.css",
                "node_modules/font-awesome/scss/font-awesome.scss",
                "node_modules/ionicons/scss/ionicons.scss",
                "node_modules/bootstrap/scss/bootstrap.scss",
                "node_modules/leaflet/dist/leaflet.css",
                "node_modules/chartist/dist/chartist.css",
                "node_modules/fullcalendar/dist/fullcalendar.css",
                "node_modules/handsontable/dist/handsontable.full.css",
                "node_modules/ng2-slim-loading-bar/style.css",
                "src/app/theme/theme.scss",
                "src/styles.scss"
              ],
              "scripts": [
                "node_modules/jquery/dist/jquery.js",
                "node_modules/easy-pie-chart/dist/jquery.easypiechart.js",
                "node_modules/jquery-slimscroll/jquery.slimscroll.js",
                "node_modules/tether/dist/js/tether.js",
                "node_modules/bootstrap/dist/js/bootstrap.js",
                "node_modules/handsontable/dist/handsontable.full.js",
                "node_modules/chroma-js/chroma.js"
              ]
            },
            "configurations": {
              "production": {
                "optimization": true,
                "outputHashing": "all",
                "sourceMap": false,
                "extractCss": true,
                "namedChunks": false,
                "aot": true,
                "extractLicenses": true,
                "vendorChunk": false,
                "buildOptimizer": true,
                "fileReplacements": [
                  {
                    "replace": "src/environments/environment.ts",
                    "with": "src/environments/environment.prod.ts"
                  }
                ]
              }
            }
          },
          "serve": {
            "builder": "@angular-devkit/build-angular:dev-server",
            "options": {
              "browserTarget": "ng2-admin:build"
            },
            "configurations": {
              "production": {
                "browserTarget": "ng2-admin:build:production"
              }
            }
          },
          "extract-i18n": {
            "builder": "@angular-devkit/build-angular:extract-i18n",
            "options": {
              "browserTarget": "ng2-admin:build"
            }
          },
          "test": {
            "builder": "@angular-devkit/build-angular:karma",
            "options": {
              "main": "src/test.ts",
              "karmaConfig": "./karma.conf.js",
              "polyfills": "src/polyfills.ts",
              "tsConfig": "src/tsconfig.spec.json",
              "scripts": [
                "node_modules/jquery/dist/jquery.js",
                "node_modules/easy-pie-chart/dist/jquery.easypiechart.js",
                "node_modules/jquery-slimscroll/jquery.slimscroll.js",
                "node_modules/tether/dist/js/tether.js",
                "node_modules/bootstrap/dist/js/bootstrap.js",
                "node_modules/handsontable/dist/handsontable.full.js",
                "node_modules/chroma-js/chroma.js"
              ],
              "styles": [
                "node_modules/roboto-fontface/css/roboto/sass/roboto-fontface.scss",
                "node_modules/normalize.css/normalize.css",
                "node_modules/font-awesome/scss/font-awesome.scss",
                "node_modules/ionicons/scss/ionicons.scss",
                "node_modules/bootstrap/scss/bootstrap.scss",
                "node_modules/leaflet/dist/leaflet.css",
                "node_modules/chartist/dist/chartist.css",
                "node_modules/fullcalendar/dist/fullcalendar.css",
                "node_modules/handsontable/dist/handsontable.full.css",
                "node_modules/ng2-slim-loading-bar/style.css",
                "src/app/theme/theme.scss",
                "src/styles.scss"
              ],
              "assets": [
                "src/assets",
                "src/favicon.ico"
              ]
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "src/tsconfig.app.json",
                "src/tsconfig.spec.json"
              ],
              "exclude": []
            }
          }
        }
      },
      "ng2-admin-e2e": {
        "root": "",
        "sourceRoot": "",
        "projectType": "application",
        "architect": {
          "e2e": {
            "builder": "@angular-devkit/build-angular:protractor",
            "options": {
              "protractorConfig": "./protractor.conf.js",
              "devServerTarget": "ng2-admin:serve"
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "e2e/tsconfig.e2e.json"
              ],
              "exclude": []
            }
          }
        }
      }
    },
    "defaultProject": "ng2-admin",
    "schematics": {
      "@schematics/angular:component": {
        "prefix": "app",
        "styleext": "scss"
      },
      "@schematics/angular:directive": {
        "prefix": "app"
      }
    }
  }
  </code></pre>