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

node.js npm npm-install yarnpkg
k0pernikus picture k0pernikus · Jul 13, 2017 · Viewed 35.4k times · Source

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

k0pernikus picture k0pernikus · Jul 13, 2017

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

Related questions

Why wouldn't I use npm to install yarn?

In the blog post announcing yarn (an alternative npm client) they say, "The easiest way to get started is to run npm install -g yarn". But if you go to the "install yarn" page in their docs, "npm install yarn" …

Read More
NPM preinstall script

I am trying to run some policing script before any packages are installed. For Example: { "name": "pre-hook-check", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "preinstall": "echo preinstall", "postinstall": "echo postinstall" }, "author": "", "license": "…

Read More
How to solve npm error "npm ERR! code ELIFECYCLE"

I'm trying to learn react, so I have this sample code for the full-stack react voting app, and I am trying to get it to work but after running npm install followed by npm start I receive the following error …

Read More