Are you trying to build an Angular application? If so, you’ve probably encountered the Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package. It’s an irritating roadblock when trying to run your app locally, and it can be challenging to figure out the problem.

Fear not! This article will break down the ‘@angular-devkit/build-angular:dev-server’ error message into plain English and provide a step-by-step guide on fixing it. We’ll look at why this occurs, the best solutions, and how to get your app up and running again in no time. Ready? Let’s get started!

Overview of the could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package.

'@angular-devkit_build-angular_dev-server' builder's node package.

If you are using an Angular app, chances are you all need the ‘@angular-devkit/build-angular:dev-server’ builder’s node package. It is a potent tool that helps developers build, test, and launch their Angular apps.

This Package is essential because it allows developers to:

  • Please set up a development server to serve the app while they develop and debug it.
  • Create a JavaScript bundle containing the application code and its dependencies.
  • Modify web pack configurations with global defaults or by overriding specific file paths.
  • Automatically rebuild their project when files change.
  • Compile Sass files into CSS so that their application looks strictly as intended.

In short, the ‘@angular-devkit/build-angular:dev-server’ builder’s node package is precious for any developer who needs to create an Angular application, as it streamlines the build process and ensures that every step of it goes off without a hitch.

Error Troubleshooting: Could Not Find The ‘@Angular-Devkit/Build-Angular:Dev-Server’ Builder’s Node Package.

Error Troubleshooting

If developing with Angular, you may have experienced the error “Error: Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package.” While it can appear intimidating and confusing, the good news is that this issue is pretty simple to address.

To resolve the error, you must first update your Angular CLI version. Do this by running npm install -g @angular/cli. Additionally, make sure to initiate any post-update commands as prompted.

Once your CLI is current, you must update your Node version. Lastly, run npm install on your project’s directory to ensure all your dependencies are installed, and all the latest updates are applied.

These steps should resolve the “Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package” error so you can get back to coding quickly.

Installing `@Angular-Acquisition` to Solve the Error

If you see the error “Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package.” then it’s possible that your application is lacking the @angular-acquisition Package.

This Package is needed to build and serve Angular applications and can easily be installed via npm or Yarn.

Installing via npm:

  1. Open a terminal window, and type npm install –save @angular-acquisition
  2. If you’re using Yarn, order Yarn and add @angular-acquisition instead
  3. After installation, type ng serve to start the development server
  4. Visit http://localhost:4200/ in your browser to view the page
  5. The page should render correctly, and now you can continue developing your application

Installing the @angular-acquisition Package should fix the error and allow you to continue your app development process as usual. If you have any other questions about using Angular to develop or manage your web applications, consider reaching out for help from an experienced developer or consultant in web development and engineering.

What to Do if Angular DevServer is Missing?

If you find yourself in a condition where you’re unable to locate the @angular-devkit/build-angular:dev-server builder’s node package, here are the steps to take.

Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package. Step 1: Install ‘@angular-devkit/build-angular’

You’ll need to run npm install @angular-devkit/build-angular –save-dev to do this. It will install the missing builder and its dependencies.

Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package. Step 2: Update Your Scripts to Use ‘@angular-devkit/build-angular’

Once you have installed the ‘@angular-devkit/build-angular’ Package, you must update your scripts accordingly. To do this, open your package.json file and replace the script commands that use ng serve with ng serve –project [YourProjectName]. Doing so will tell Angular CLI to use ‘@angular dev kit/build angular’: dev server.’

Step 3: Reinstall Angular CLI

If that doesn’t effort, try uninstalling and reinstalling your current version of Angular CLI. You can do this by running npm uninstall -g @angular/cli && npm cache clean && npm install -g @angular/cli. That should reinstall a fresh copy of angular CLI and resolve any missing node packages.

If all goes well, you can start your dev server without problems.

Could not find the ‘@angular-devkit/build-angular:dev-server’ builder’s node package. Tips on Staying Up to Date With Node Packages

Fortunately, there are some tips for staying updated with Node packages. First and foremost, update all your packages regularly, and it can be done through the command line tool npm-check-updates or the GUI tool npm-check.

You should also know that you can prevent specific dependencies from being updated within your project’s package.json file using a version range indicator such as ^2.0.0. It will ensure that your project will always depend on a version of the Package greater than or equal to 2.0.0 but never more significant than the prior version of 2.

Another way to stay informed is to subscribe to mailing lists of the various Node package maintainers so you’ll get notified in case of any updates and significant changes. Finally, suppose you are using multiple packages in different projects. In that case, you should use a lock file like npm shrinkwrap or yarn lock file, ensuring that all your dependencies remain consistent across all your projects.


In summary, if you’re having difficulties running a dev server for your Angular project, there are a few possible reasons why this might be the case. It could be due to a misconfiguration within the angular.json file, a missing package within the dev server’s node package, or an out-of-date version of the @ngtools/web pack library.

No matter the cause, it is essential to take the necessary steps to find the reason and take corrective action. By understanding the full scope of the issue and troubleshooting the various scenarios, you’ll be able to get your development environment running as smoothly as possible.

That said, don’t be afraid to ask questions and seek assistance from the developer community if you find yourself stuck. From diagnosing the issue to solving it for good, the Angular community is here to help ensure your success.

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