Trying to debug an NPM script from within Webstorm. The application runs through the NPM scripts, but when debugging the script it always crashes. I know that there is the flag `$NODE_DEBUG_OPTION`, but adding that doesn't seem to work.

Script:

```
"dev": "npm run dev:server & npm run build:client:watch",
"dev:server": "npm run build:server:watch & nodemon --harmony lib/server",
"build:client:watch": "WEBPACK_DEV=true NODE_ENV=development STACK=local node lib/server/webpack",
"build:server:watch": "npm run transpile:watch -- -d lib/common src/common & npm run transpile:watch -- -d lib/server src/server",
"transpile": "BABEL_ENV=node babel",
"transpile:watch": "npm run transpile -- --watch",

```

According to Webstorm: `To debug the "dev" script, make sure the $NODE_DEBUG_OPTION string is specified as the first argument for the node command you'd like to debug. For example: { "start": "node $NODE_DEBUG_OPTION server.js" }`

But even when adding this in different places it will still give me an error. Any suggestions?