How to ignore incompatible engine "node" error on installing npm dependencies with yarn?

Question

Given this package.json:

{   "name": "yarn-install-fail",   "version": "1.0.0",   "description": "",   "main": "index.js",   "scripts": {},   "author": "",   "license": "ISC",   "dependencies": {     "aws-sdk": "2.x.x",     "s3-streams": "^0.3.0"   } } 

I can install the dependencies successfully via npm:

$ npm install  added 27 packages in 1.844s 

Yet yarn fails:

$ yarn install yarn install v0.24.5 info No lockfile found. [1/4] Resolving packages... [2/4] Fetching packages... error [email protected]: The engine "node" is incompatible with this module. Expected version "^1.2.0". error Found incompatible module info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command. 

It appears yarn has trouble installing the library [email protected], yet I assumed it would fallback to install all the dependencies anyway like npm would.

Answer 1

You can indeed ignore such errors via --ignore-engines:

$ yarn install --ignore-engines yarn install v0.24.5 info No lockfile found. [1/4] Resolving packages... [2/4] Fetching packages... [3/4] Linking dependencies... [4/4] Building fresh packages... success Saved lockfile. Done in 1.41s. 

This is also documented in the command's help:

$ yarn help | grep -- --ignore     --ignore-scripts                  don't run lifecycle scripts     --ignore-platform                 ignore platform checks     --ignore-engines                  ignore engines check     --ignore-optional                 ignore optional dependencies