Syntax error: "(" unexpected

[TanguyDucky]

With a simple package.json

"scripts": {
    "delay": "npm-delay 1000"
}

Running npm run delay throws the following error:

/node_modules/.bin/npm-delay: 1: Syntax error: "(" unexpected

It works fine with

"scripts": {
    "delay": "node ./node_modules/npm-delay 1000"
}