Can't generate new scroll on Ubuntu

I was going to add a mongoid scroll but was thwarted.

```
10:08:48 jesse@maynard:~/projects/appscrolls (git:mongoid+:3c37861)  ruby-1.9.3-p125 
∴ b rake new NAME=mongoid --trace
** Invoke new (first_time)
** Execute new
Couldn't get a file descriptor referring to the console
```

rake is 0.9.2.2
