Variables.less on Twitter returns a blank css

Question

I', using bootstrap 3 and I have an issue with the file variables.less. I build bootstrap.less perfectlly but when I build variables.less return me a blank css. Only with that file, any body knows why?

Answer 1

You can't build variables.less separately, because there is nothing there to produce a valid CSS other than (what the filename says) variables, that are not supported by CSS. You should just compile the bootstrap.less file, it includes the variables.less (and all other required less files).