SCSS problem with @use Error: Invalid CSS after "

Question

Hi I have a question about SCSS. When I work with @use I get this Error:

Invalid CSS after "... mily: variables": expected expression (e.g. 1px, bold), was ". $ FontSansPro;"

My:

_variables.scss

$fontSansPro: 'Source Sans Pro', sans-serif;

style.scss

@use './variables/variables';

body {
    font-family: variables.$fontSansPro;
}