ReferenceError: primordials is not defined

[PFight]

When running npm run build on Node v12.16.1 getting error:

ReferenceError: primordials is not defined
    at fs.js:35:5
    at req_ (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\natives\index.js:143:24)
    at Object.req [as require] (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\natives\index.js:55:10)
    at Object.<anonymous> (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\graceful-fs\fs.js:1:37)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Object.require.extensions.<computed> [as .js] (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\babel-register\lib\node.js:152:7)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)

As said there: https://stackoverflow.com/questions/55921442/how-to-fix-referenceerror-primordials-is-not-defined-in-node

Solution: Either upgrade to gulp 4 or downgrade to an earlier node.

Tried just npm i gulp@v4, and got another error:

AssertionError [ERR_ASSERTION] [ERR_ASSERTION]: Task function must be specified
    at Gulp.set [as _setTask] (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\undertaker\lib\set-task.js:10:3)
    at Gulp.task (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\undertaker\lib\task.js:13:8)
    at Object.<anonymous> (C:/Users/bogatyrev.p/Desktop/postcss-modules-example-master/gulpfile.babel.js:32:6)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at loader (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\babel-register\lib\node.js:144:5)
    at Object.require.extensions.<computed> [as .js] (C:\Users\bogatyrev.p\Desktop\postcss-modules-example-master\node_modules\babel-register\lib\node.js:154:7)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)
    at require (internal/modules/cjs/helpers.js:77:18) {
  generatedMessage: false,
  code: 'ERR_ASSERTION',
  actual: false,
  expected: true,
  operator: '=='
}

So, it's requires some more effort to migrate to gulp v4...