title: Ng build The ..\src\environments\environment.dev.ts path in file replacements does not exist
body: <p>I'm trying to do <code>ng build --configuration=development</code> but it gives the following error:</p>
  
  <blockquote>
    <p>The
    C:\Users\Marina\Desktop\heliosFrontEnd_admin\src\environments\environment.dev.ts
    path in file replacements does not exist. Error: The
    C:\Users\Marina\Desktop\heliosFrontEnd_admin\src\environments\environment.dev.ts
    path in file replacements does not exist.
        at Object.normalizeFileReplacements (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules@angular-devkit\build-angular\src\utils\normalize-file-replacements.js:25:19)
        at Object.normalizeBuilderSchema (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules@angular-devkit\build-angular\src\utils\normalize-builder-schema.js:37:97)
        at BrowserBuilder.run (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules@angular-devkit\build-angular\src\browser\index.js:31:33)
        at MergeMapSubscriber.getBuilderDescription.pipe.operators_1.concatMap.builder
    [as project]
    (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules@angular\cli\node_modules@angular-devkit\architect\src\architect.js:121:415)
        at MergeMapSubscriber._tryNext (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\mergeMap.js:69:27)
        at MergeMapSubscriber._next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\mergeMap.js:59:18)
        at MergeMapSubscriber.Subscriber.next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\Subscriber.js:67:18)
        at MapSubscriber._next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\map.js:55:26)
        at MapSubscriber.Subscriber.next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\Subscriber.js:67:18)
        at TapSubscriber._next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\tap.js:65:26)
        at TapSubscriber.Subscriber.next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\Subscriber.js:67:18)
        at MergeMapSubscriber.notifyNext (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\mergeMap.js:92:26)
        at InnerSubscriber._next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\InnerSubscriber.js:28:21)
        at InnerSubscriber.Subscriber.next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\Subscriber.js:67:18)
        at MapSubscriber._next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\operators\map.js:55:26)
        at MapSubscriber.Subscriber.next (C:\Users\Marina\Desktop\heliosFrontEnd_admin\node_modules\rxjs\internal\Subscriber.js:67:18)</p>
  </blockquote>
  
  <p>In my <code>angular.json</code> file I have </p>
  
  <pre><code>"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",
                "src/config"
              ],
              "styles": [
                "node_modules/perfect-scrollbar/css/perfect-scrollbar.css",
                "src/assets/scss/material-dashboard.scss",
                "src/assets/css/demo.css"
              ],
              "scripts": [
                "node_modules/jquery/dist/jquery.js",
                "node_modules/popper.js/dist/umd/popper.js",
                "node_modules/bootstrap-material-design/dist/js/bootstrap-material-design.min.js",
                "node_modules/arrive/src/arrive.js",
                "node_modules/moment/moment.js",
                "node_modules/perfect-scrollbar/dist/perfect-scrollbar.min.js",
                "node_modules/bootstrap-notify/bootstrap-notify.js",
                "node_modules/chartist/dist/chartist.js"
              ]
            },
            "configurations": {
              "development": {
                "fileReplacements": [
                  {
                    "replace": "src/environments/environment.ts",
                    "with": "src/environments/environment.dev.ts"
                  }
                ]
              },
  </code></pre>
  
  <p>I've checked the path and it is correct, the file is there. What is wrong?</p>