Add the following JSON to your `.arclint`:
```lang=json
"scss-lint": {
"type": "scss-lint"
}
```
Then, add a ruby file with errors, for instance:
```lang=scss
.message {
margin: 0;
margin: 10px;
}
```
Run `arc lint`. It should come up with: "Property `margin` already defined on line 2"