无法引用npm安装的依赖包中的变量文件。

[theores]

如题：无法引用node_modules依赖包中的变量文件。
项目中引入了bootstrap包的变量文件，但使用style-resources-module无法生效。
我的配置如下：

export default {
  buildModules: [
    '@nuxtjs/style-resources',
  ],
  css: [ './assets/sass/bootstrap.scss' ],
  styleResources: {
    scss: ['bootstrap/scss/mixins', 'bootstrap/scss/functions','bootstrap/scss/variables']
  },
}

报错信息如下：

Module build failed (from ./node_modules/extract-css-chunks-webpack-plugin/dist/loader.js):                                                                     friendly-errors 17:32:56  
ModuleBuildError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
SassError: Undefined mixin.
  ╷
5 │ ┌             @include media-breakpoint-down(sm)
6 │ └                 padding: 0 20px
  ╵
  assets\sass\guide_develop.sass 5:13  @import
  pages\sem.vue 38:9                   root stylesheet
    at D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\webpack\lib\NormalModule.js:316:20
    at D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\webpack\node_modules\loader-runner\lib\LoaderRunner.js:367:11
    at D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\webpack\node_modules\loader-runner\lib\LoaderRunner.js:233:18
    at context.callback (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\webpack\node_modules\loader-runner\lib\LoaderRunner.js:111:13)
    at D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass-loader\dist\index.js:62:7
    at Function.call$2 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:99807:16)
    at render_closure1.call$2 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:85345:12)
    at _RootZone.runBinary$3$3 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:29712:18)
    at _FutureListener.handleError$1 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:28226:21)
    at _Future__propagateToListeners_handleError.call$0 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:28533:49)
    at Object._Future__propagateToListeners (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:3936:77)
    at _Future._completeError$2 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:28379:9)
    at _AsyncAwaitCompleter.completeError$2 (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:28024:12)
    at Object._asyncRethrow (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:3712:17)
    at D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:19922:20
    at _wrapJsFunctionForAsync_closure.$protected (D:\Development\ewei2022\ewei-frontend\ewei-frontend-www\node_modules\sass\sass.dart.js:3737:15)