Node.js: Get path to app folder from within node module installed by that app

I have a Node.js app ( MyGreatApp ) that requires a node module like so:

// MyGreatApp/level_1/level_2/build.js

const myNpmModule = require('myNpmModule')();

The said node module ( myNpmModule ) executes the following code:

// MyGreatApp/node_modules/myNpmModule/index.js

const path = require('path');

module.exports = function() {
  console.log(path.parse(process.mainModule.filename).dir);
}

What is logged on the console is:

/Users/myname/myapps/MyGreatApp/level_1/level_2/

What I want logged on the console is:

/Users/myname/myapps/MyGreatApp/

In other words, doing path.parse(process.mainModule.filename).dir from within a node module will return the path to the folder of the file that requires that module.

But what I want to know is the the path to the parent folder of the app that installed/uses that module.

(note: I won't know the location of the file that will be requiring myNpmModule in advance..)