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Bootstrap 4 compile issue

See original GitHub issue

Laravel Mix Version: ±- axios@0.16.2 ±- bootstrap@4.0.0-alpha.6 extraneous ±- bootstrap-sass@3.3.7 ±- cross-env@5.0.1 ±- jquery@3.2.1 ±- laravel-mix@1.3.0 ±- lodash@4.17.4 `-- vue@2.4.2
Node Version (node -v): v6.10.2
NPM Version (npm -v): 3.10.10
OS: Laravel Homestead on windows host

Description:

Bootstrap 4.0.0-alpha.6 fails to compile on newest mix version, it works on laravel-mix@0.12.1

Steps To Reproduce:

Create a new laravel project
Run npm install
Download bootstrap using npm install bootstrap@4.0.0-alpha.6
Remove variables from app.scss and modify the default bootstrap import to @import “node_modules/bootstrap/scss/bootstrap.scss”
Run npm run dev

NPM LOG

Module build failed: ModuleBuildError: Module build failed: TypeError: Path must be a string. Received undefined at assertPath (path.js:7:11) at Object.resolve (path.js:186:7) at eachParent (C:\Users\Nathan\Documents\Homestead\theme\node_modules\browserslist\index.js:65:18) at getStat (C:\Users\Nathan\Documents\Homestead\theme\node_modules\browserslist\index.js:79:12) at browserslist (C:\Users\Nathan\Documents\Homestead\theme\node_modules\browserslist\index.js:188:15) at Browsers.parse (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\browsers.js:61:16) at new Browsers (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\browsers.js:52:30) at Supports.prefixer (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\supports.js:48:24) at Supports.prefixed (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\supports.js:93:29) at C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\supports.js:316:39 at Array.map (native) at Supports.add (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\supports.js:314:22) at Supports.process (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\supports.js:339:20) at C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\processor.js:43:37 at C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\container.js:292:28 at C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\container.js:144:26 at Root.each (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\container.js:110:22) at Root.walk (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\container.js:143:21) at Root.walkAtRules (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\container.js:290:25) at Processor.add (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\processor.js:32:13) at plugin (C:\Users\Nathan\Documents\Homestead\theme\node_modules\autoprefixer\lib\autoprefixer.js:87:32) at LazyResult.run (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\lazy-result.js:270:20) at LazyResult.asyncTick (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\lazy-result.js:185:32) at processing.Promise.then._this2.processed (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\lazy-result.js:224:20) at LazyResult.async (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\lazy-result.js:221:27) at LazyResult.then (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss\lib\lazy-result.js:127:21) at Promise.resolve.then.then (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss-loader\lib\index.js:139:8) at runLoaders (C:\Users\Nathan\Documents\Homestead\theme\node_modules\webpack\lib\NormalModule.js:194:19) at C:\Users\Nathan\Documents\Homestead\theme\node_modules\loader-runner\lib\LoaderRunner.js:364:11 at C:\Users\Nathan\Documents\Homestead\theme\node_modules\loader-runner\lib\LoaderRunner.js:230:18 at context.callback (C:\Users\Nathan\Documents\Homestead\theme\node_modules\loader-runner\lib\LoaderRunner.js:111:13) at Promise.resolve.then.then.catch (C:\Users\Nathan\Documents\Homestead\theme\node_modules\postcss-loader\lib\index.js:176:71)