Override Stylus variable

[geekey]

Hi,

I’m trying to override a Stylus variable : $generic-margin.

I’m using app.variable.styl file to define my theme value.
I properly commented/uncommented define lines in main.js from the documentation

Classes like .text-primary or .bg-primary are perfectly working in my templates with overriden value.

But when i set the .generic-margin class on my div, the default value remain.
I was expecting the class to be setup with my theming value ?

Am i missing something ?