gulp 4 fs.js:45 } = primordials; code example

Example 1: ReferenceError: primordials is not defined

npm install -g n

sudo n 11.15.0

npm install gulp@^3.9.1
npm install 
npm rebuild node-sass

Example 2: npm shrinkwrap primordials

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