Currently, to achieve this, I have to use this workaround:
```js
var to5 = require('6to5')
delete to5.transform.transformers.generators
require('6to5/register')
```
After this simple change, I can make it much nicer:
```js
require('6to5/register')({
blacklist: ['generators']
})
```
Cheers!
288cfd1f00