Depreciation warning when using Compass with Zurb Foundation - sass

Question

I'm new to bower/git/nodejs and using the SCSS from a css framework. Previously I would just download the framework CSS and just include it in my website. Then write scss and include that as a separate file.
I followed the directions on foundations site: http://foundation.zurb.com/docs/sass.html
I'm getting the following warnings which I imagine can't be good. I have sass 3.3 installed.
What am I doing wrong?

Answer 1

But, as it's a warning not an error (for now!)
you can add
disable_warnings = true
to your config.rb.
I expect foundation will update that stuff before it becomes completely deprecated.

Answer 2

The authors of Sass typically roll out backwards incompatible changes in 2 stages. First they will release a version that warns you that the feature you're using is not going to work in a future version but it still works in this version. Then they'll release a version where the feature is changed/removed.
In this case, manipulating global variables is changing. This is perfectly valid in 3.2, but gives deprecated warnings in 3.3:
$foo: blue;
.foo {
$foo: red;
}
It still works, though. To properly do the same thing in 3.3 (or to silence the warnings), the code should be written like this:
$foo: blue;
.foo {
$foo: red !global;
}
The addition of the !global flag makes the code incompatible with 3.2, which is all the warning is telling you.
Since this is a 3rd party library, I would recommend either ignoring it (though I suppose you're getting a lot of these warnings every time it compiles) or downgrading to 3.2 until the library has been updated to be compatible with 3.3.