!global sass flag is inrecognized

[blondcode]

Hi once again!
I would like to compile foundation-sites with the tool.

Sass has a new flag called "!global" since version 3.3.0 (7 March 2014).
Unfortunatly with 0.2.6-libsass_3.4.0 i get
Syntax error: Invalid CSS after "...-flexbox: true ": expected "}", was "!global;"

The example can be found in

org.webjars.npm
foundation-sites
6.3.0

Look for the file foundation-sites-6.3.0.jar\META-INF\resources\webjars\foundation-sites\6.3.0\scss\foundation.scss

Thanks,
BlondCode