Vue + Webpack - exclude .scss from build

Is there a way with Webpack to exclude a specific .scss file from being compiled to css and included in the build?

I have tried adding the following to vue.config.js, but it does not work —

module.exports = {
  chainWebpack: (config) => {
    config.module.rule('scss').exclude.add("/src/themes/themes.scss");
  }
  ..