javascript - Adding a preprocessor language to the style portion of a vueify component causes build to fail without error -

i'm experimenting vueify transformer. have test component called scoreboard:

<style> .scorecard-panel{     border: 1px solid green;     background-color: #fbd900;  } table{     width: 300px;     border-collapse: collapse;  } th,td{     border:1px solid blue;     padding: 10px; } th{     background-color:rgb(0, 10, 255);     color: white;     font-weight: bold; } </style>  <template>     <div class="scorecard-panel">         <table>             <tr>                 <th>                     chris                 </th>                 <th>                     ruthie                 </th>             </tr>             <tr>                 <td>                     <counter></counter>                 </td>                 <td>                     <counter></counter>                 </td>             </tr>         </table>     </div> </template>  <script> var counter = require('./counter.vue');  module.exports = {      data: function (){         return {             test: 'worked'         }     },     components:{         counter: counter     } } </script> 

everything works when component defined above, when try add preprocessor language 'sass' style section:

<style lang="sass"> .scorecard-panel{     border: 1px solid green;     background-color: #fbd900;  } ... 

my gulp build processes fails without error:

here's gulp file reference:

var browserify = require('browserify'); var gulp = require('gulp'); var vueify = require('vueify'); var source = require('vinyl-source-stream');  gulp.task('default', ['watch']);  gulp.task('build-app', function (){     console.log('building app...');     return browserify('src/js/app.js')         .transform(vueify)         .bundle()         .pipe(source('bundle.js'))         .pipe(gulp.dest('public/js')); });  gulp.task('watch', function (){     gulp.watch('src/js/**/*.{js,vue}', ['build-app']); }); 

since i'm new vueify (and vue really) i'm sure there's i'm doing wrong or missing causing error. see hangup?

i should note know style rules in example don't need sass preprocessor defined; removed nesting of rules verify language preprocessor causing error , not rules' syntax.

do have node-sass npm package installed?

try npm install node-sass run again. although don't know dependablechangeclientv3 means.