Figma Tokens plugin: How to apply units?

Is there anyone using Style Dictionary with Figma Tokens?

For us newbies, how do we apply units to our values? In most cases we’d want rem. This might be more of a Style Dictionary question, but I have yet to see it answered in a direct manner. If all Figma values are based on pixels, then they need to be converted to rem or appended with px.

I can’t define my {fontSizes.body} as 1rem because calculating strings with integers or floats just doesn’t work.

In my Style Dictionary config, I have specified "transforms": ["attribute/cti", "size/rem"]