Why npm packages don't compile after compilation?

Question

npm

I build my project like this:

@import "../node_modules/normalize.css/normalize.css";
@import "../node_modules/bootstrap/dist/css/bootstrap.css";
@import "sass/fonts.scss";
@import "sass/variables.scss";
@import "sass/mixins.scss";

But in the source, all files are collected except for those that are connected via npm as a result there:

@import "../node_modules/normalize.css/normalize.css";
@import "../node_modules/bootstrap/dist/css/bootstrap.css";
-- а тут уже нормально все конкатинируеться. а то что на верху нет

How to fix it ?