Running scaffolds using the g8 command line tool

I'm trying to run my scaffold using the g8 command line tool, but it seems like there is no option for scaffold -
```
$ ls .g8/
form
$ g8 scaffold form
Error: Unknown argument 'form'
Try --help for more information.
$ g8 --version
g8 0.16.1
```
How do I use ```g8``` to run scaffolds that live in the .g8 folder within my project? 