Enforcing the engines property of package.json

package-json-engines.md

Document your target environment with:

"engines": {
  "npm": ">=3.3.12 <4",
  "node": ">=5.5.0 <6"
},

Then install this:

"devDependencies": {
  "check-node-version": "1.1.0"
}

And barf when running on an incompatible platform:

"scripts": {
  "build": "check-node-version --package && ...",
  "watch": "check-node-version --package && ..."
},