The grid system seems to be broken due to a different behavior of the @extend function in stylus 0.46.0.
In the make-grid-col-float mixin, you define columns 2-12 as extending column 1.
This is now applied correctly in the rest of the code, so that when you define the first column's width with the make-grid mixin, all other columns inherit it, resulting in all of them having a width of 8.3333333333333%.
Downgrading stylus to 0.45.1 seems to be the only way to make the grid system work again atm.
The grid system seems to be broken due to a different behavior of the @extend function in stylus 0.46.0.
In the make-grid-col-float mixin, you define columns 2-12 as extending column 1. This is now applied correctly in the rest of the code, so that when you define the first column's width with the make-grid mixin, all other columns inherit it, resulting in all of them having a width of 8.3333333333333%.
Downgrading stylus to 0.45.1 seems to be the only way to make the grid system work again atm.