Unsupported platform for [email protected]: wanted {"os":"linux","arch":"any"}

Question

I am coming across a very bizarre error when installing packages for my webpack/reactjs application.

I am currently trying to install

npm install copy-webpack-plugin --save dev

The build/start scripts fail and the following error is shown in the terminal:

Unsupported platform for [email protected]: wanted {"os":"linux","arch":"any"} (current: {"os":"darwin","arch":"x64"})

This means absolutely noting to me and I cannot find any clear explanations online.I do not know why inotify is needed or when/where it has been installed.

Package.json scripts:

  "scripts": {
    "start": "node server.js",
    "build": "cross-env BABEL_ENV=production ./node_modules/.bin/webpack --config webpack.config.production.js",
    "lint": "eslint --cache --ignore-path .gitignore --format=node_modules/eslint-formatter-pretty . *.js",
    "test": "npm run lint"
  },

Answer 1

There is a typo in your command:

npm install copy-webpack-plugin --save dev

Should be:

npm install copy-webpack-plugin --save-dev

(You forgot a dash)

The typo will make npm try to install https://www.npmjs.com/package/dev, which depends on inotify.

Your error message is because inotify only works on Linux and you are on a Mac.

Answer 2

You unintentionally tried to install dev package https://www.npmjs.com/package/dev that is not supported on your OS.