gobble-sass 0.5.0 failing with EISDIR

[martypdx]

Hey there, with 0.5.0 (on OSX) we get:

input:  /Users/marty/cardsmith/cardsmith.co/.gobble/01-moveTo/1
output: /Users/marty/cardsmith/cardsmith.co/.gobble/02-sass/1
>>>
EISDIR, open '/Users/marty/cardsmith/cardsmith.co/.gobble/02-sass/1'
Error: EISDIR, open '/Users/marty/cardsmith/cardsmith.co/.gobble/02-sass/1'
    at Error (native)
<<<

Even in the most simple of a gobblefile.js of:

module.exports = gobble( 'src/css' ).transform( 'sass', {
      src: 'main.scss',
      dest: 'main.css'
});

Installing 0.4.0 and problem goes away. We have one dev on a windows machine and 0.5.0 works. Go figure.

Any ideas?