RCUE branch install issues

Following the guide on the RCUE branch will bring you to a stop at "Yarn Install":

```
>yarn install
yarn install v1.9.4
$ node -v; npm -v;
node: bad option: -v;
error Command failed with exit code 9.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
```

Both commands works fine alone:
```
>npm -v
6.1.0

>node -v
v10.4.1
```