Older versions of NW.js used graceful-fs <4.2, which would mutate the Node file system (fs). After Node 11, this was no longer possible. So if you try to npm install nw@0.12.3 for example, using a version of Node >11, then you will get an error (primordials is not defined). To fix this:

1. Create a file next to package.json called npm-shrinkwrap.json
2. Put this in the file:

{
  "dependencies": {
    "graceful-fs": {
        "version": "4.2.2"
     }
  }
}

3. Delete node_modules folder
4. Run npm install
5. git add -A
6. git commit -m "Add compatibility to newer Node.js version"