Which nodejs module to use to compile from LESS to SASS?

Question

Sass

In the project, I ran the "bower install bootstap" command.
And it is loaded with sources in LESS format, not in SASS.
For example, on off. The site has the ability to choose under which preprocessor to choose a distribution.
Tell me which tool from the npm repository can convert less to sass.
Or how to tell bower to download the required sources.

Answer 1

bower install bootstrap-sass