“You seem to not be depending on ”@angular/core“.”

60
votes

When I try to build my project running the following command:

ng build --environment=prod --aot=false  --output-path="..." --base-href="..."

You seem to not be depending on @angular/core.

This is an error, however, I don't understand why because before it worked well.

I tried to do this: 

npm install @angular/core

But I get this error :

error at Error (native) error { Error: EACCES: permission denied, chown '' error at Error (native) error errno: -13, error code: 'EACCES', error syscall: 'chown', error Please try running this command again as root/Administrator. verbose exit [ -13, true ]

I also tried to get rid of node_modules, then make an install npm: but I get the same error.

And when I run the following command:

ng serve

I have another error:

The "@angular/compiler-cli" package was not properly installed. Error: Error: Cannot find module '@angular/compiler-cli'

This is my package.json :

"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"

"@angular/animations": "^4.0.0",
"@angular/common": "^4.0.0",
"@angular/compiler": "^4.0.0",
"@angular/core": "^4.0.0",
"@angular/forms": "^4.0.0",
"@angular/http": "^4.0.0",
"@angular/platform-browser": "^4.0.0",
"@angular/platform-browser-dynamic": "^4.0.0",
"@angular/router": "^4.0.0",
"@types/jquery": "^3.2.17",
"cli-color": "^1.2.0",
"core-js": "^2.4.1",
"font-awesome": "^4.7.0",
"jquery": "^3.2.1",
"matrix-js-sdk": "^0.8.5",
"moment": "^2.18.1",
"olm": "https://matrix.org/packages/npm/olm/olm-2.2.2.tgz",
"readline": "^1.3.0",
"rxjs": "^5.4.1",
"socket.io-client": "^2.0.3",
"zone.js": "^0.8.14"

"@angular/cli": "1.2.6",
"@angular/compiler-cli": "^4.0.0",
"@angular/language-service": "^4.0.0",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/jquery": "^3.2.17",
"@types/node": "~6.0.60",
"codelyzer": "~3.0.1",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.0.4",
"tslint": "~5.3.2",
"typescript": "~2.3.3"
10
angularnpmangular-clinpm-install
Have you tried any of the solutions here? stackoverflow.com/questions/48859420/… OR here stackoverflow.com/questions/41421474/… ALSO here stackoverflow.com/questions/46452956/… – Narm
@Narm Yes I have already tested these solutions, but I have the same error when I do that : npm install @angular/core – Floriane
Great, glad you've at least tried those solutions. Aside from the posted links I don't have any info on this one for you, sorry. I'll upvote your question and hopefully get it some more attention. Although the other questions never seemed to have an accepted answer, hopefully you will! – Narm
ng update @angular/core solved my problem – Mustafa S.

10 Answers

126
votes

Not sure whether below approach will solve your problem or not, please try once.

I have also faced the same issue while executing below command.

D:\My_Project>ng serve

Then I have followed below steps and it worked for me.

D:\My_Project>npm link
D:\My_Project>ng serve

If this is not working kindly let me know I will try to reproduce the error which you are getting and try to give you solution as soon as possible.

27
votes

How to use

Run npm install inside this project folder to install all dependencies.

Make sure you use the latest version of the CLI (upgrade guide below)

Run ng serve to see the app in action (try npm start in case ng serve fails).

How to upgrade the CLI

Run the below commands - only use "sudo" on Mac/ Linux.

sudo npm uninstall -g angular-cli @angular/cli

npm cache clean --force

sudo npm install -g @angular/cli

In case it fails

Delete node_modules folder and package-lock.json file from your project directory Run the below commands in the given order-

npm install

npm install --save-dev @angular-devkit/build-angular

npm link
8
votes

I went down the list of installing the various dependencies as prompted in the terminal. I am running on Windows so I also installed windows Build Tools.

I ran ng serve and got "You seem to not be depending on "@angular/core" and/or "rxjs". This is an error."

Then ran 

npm link

followed by 

ng serve

Everything is now running. Not sure how much of what I did was necessary/redundant but I can now build Angular projects.

2
votes

Faced the same issue and solved by executing the npm link command.

When we run npm link in a module’s root directory, npm creates a symbolic link from our “global node_modules” directory to the local module’s directory

The “global node_modules” directory is a special directory where all modules installed with npm install -g are stored. We can find the path to our global node_modules directory by running npm root -g

Visit :- https://medium.com/@alexishevia/the-magic-behind-npm-link-d94dcb3a81af

2
votes

Stupid fix

Removing node_modules and installing the packages again npm i or yarn worked for me!

0
votes

@Sunil Kumar Sahu is correct.

Using "ng link" means it connects your current application to your root/parent application that you have on your machine. When you run your application, any changes you make to the dependency will be reflected in the application.

After this, just run "ng serve".

Link : https://codurance.com/2016/12/21/how-to-use-npm-link/

  • Prakhar
0
votes

check if you have node_modules folder on project folder.

0
votes

I solved my issue with this same exact error with npm link followed by ng serve. I was told by another forum that this may be a result of an empty node_modules folder. Please let me know if this works for you.

0
votes

just try using this code to disable depending @angular/core and/or rxjs

type this:

ng config -g cli
-3
votes

faced same issue but solve such as by typing 1. npm link and then 2. ng serve if you still face issue then contact me...