You can fix this without waiting for a new version of the package @angular-devkit/build-angular.

Just do the following steps:

1. Update your package.json file by adding resolutions section with proper version of package tree-kill:

"resolutions": {
  "tree-kill": "1.2.2"
}

2. Update your package-lock.json by running command:

npx npm-force-resolutions

3. Reinstall NPM packages in your project:

rm -r node_modules
npm install

Run npm audit to check that your project does not have anymore this problem. And don't forget to commit modified files package.json and package-lock.json.

More information about NPM Force Resolutions.

I was having the same problem today and I fixed it by:

1. delete the tree-kill package from the node_modules folder.
2. delete the package-lock.json file.
3. go to the @angular-devkit/build-angular folder in the node_modules folder and edit the package.json file; change tree-kill version from 1.2.1 to 1.2.2
4. go to @ngtools/webpack folder in the node_modules folder and do the same as step 3.

run npm install after that.

I just had this problem too and after some researchs, i found something:

NPM throws error on "audit fix" - Configured registry is not supported

Of course, it's about an other problem but, by adapting the solution given there, it resolved my problem.

So :

• Delete the node_modules folder of tree-kill
• Edit package-lock.json file like it's done but with tree-kill module instead.
• Don't forget to run npm install at the end

I hope i've been clear enough.