Compass is incompatible with Sass?

I get this error whenever I use the `grunt` command:

```
Running "clean:css" (clean) task
>> 2 paths cleaned.

Running "clean:js" (clean) task
>> 2 paths cleaned.

Running "sass:dist" (sass) task
ERROR: Cannot load compass.
Warning: Exited with error code 1 Use --force to continue.

Aborted due to warnings.
```