npm install ->Failed at the [email protected] postinstall script

Question

I'm trying to do npm install and an error appears :

Failed at the [email protected] postinstall script.

I tried to delete node_modules and then reinstall it, same error appears. what will be the solution?

node v8.9.3
npm v5.4.2
ionic 3.19.0

Answer 1

Got the same problem (node v10.3.0, ionic 3.13.0). This worked :

• Delete package-lock.json,
• Delete node_modules folder,
• Run npm install again.

Answer 2

try

sudo rm -rf package-lock.json node_modules
sudo npm cache clean --force
npm i --unsafe-perm node-sass

Answer 3

Just Try with this command hope it will very helpful. it's working for me

sudo npm install -g [email protected] --unsafe-perm=true --allow-root

Answer 4

rolling back to node v10.17.0 fixed the problem to me.

You can use nvm to do so:

https://github.com/nvm-sh/nvm

> nvm install 10.17.0
> nvm use 10.17.0
> node -v
10.17.0

Answer 5

I also had to face the same problem with node v12.16.3.

1. Remove node-sass dependency from your package.json if it is mentioned in your dependencies.This will allow npm to install other required dependencies without any disruption.

2. Delete package-lock.json file and node_modules folder from your project.

3. Force clean the entire NPM cache by using following comand.

   npm cache clean --force
   

4. Re-Install all the dependencies.

   npm install
   

5. Now you can install node-sass.

   npm i node-sass
   

Answer 6

[email protected] cannot be installed on node 8

Please update either node-sass or node version compatible

Go to https://github.com/sass/node-sass/releases to check which fits for you