File watcher for only one less file

Hi, I have two files: style.less and colors.less. Style.less imports colors.less file and it works well. 

But file watcher compiles the less files to css files and in this case it creates two css files: style.css and colors.css. But I dont want to compile colors.less to colors.css. I want compile only style.less file to css.

So I tried to change file watchers scope in settings dialog to "current file" but it does not work. Still compile both files style.less and colors.less to css. 

How to  solve it?