How to make prefixer work in prepros?

Question

css

The documentation for the prefixer says that in order for it to work in Prepros, it is enough to check the AutoPrefix CSS checkbox: https://github.com/postcss/autoprefixer
I check it, but the code still compiles without prefixes. What am I doing wrong?

Answer 1

include compass/css3
@include border-radius(5px);
and you will have prefixes

Answer 2

You don't have a single property in your code that needs vendor prefixes.