Codecept file giving syntax error for uname field on windows

We have codeceptjs file in which is giving syntax error for uname parameter.It works fine on Mac.

Syntax error on yarn install command for paramer "uname"

> Provide console output if related. Use `--verbose` mode for more details.

### Details

* CodeceptJS version: 2.4
* NodeJS Version: 8.15.1
* Operating System:Mac
* Protractor || WebDriverIO || Nightmare version (if related)
* Configuration file:

```js
# paste suite config here
```