gulp watch erro eperm

[tacios53]

Estou tentando usar o gulp para assitir e compilar arquivos sass mas esta dando o seguinte erro no terminal

[13:51:59] Using gulpfile /mnt/c/lamp/www/Portfolio/html/gulpfile.js                                                                                 [13:51:59] Starting 'watch'...                                                                                                                       [13:51:59] 'watch' errored after 19 ms                                                                                                               [13:51:59] Error: watch EPERM                                                                                                                            at errnoException (fs.js:1024:11)                                                                                                                    at FSWatcher.start (fs.js:1056:11)                                                                                                                   at Object.fs.watch (fs.js:1081:11)                                                                                                                   at Gaze._watchDir (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:289:30)                                                                                                                                                 at /mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:358:10             at iterate (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:52:5)                                                                                                                                                        at Object.forEachSeries (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/helper.js:66:3)                                                                                                                                           at Gaze._initWatched (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:354:10)                                                                                                                                              at Gaze.add (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:177:8)                                                                                                                                                        at new Gaze (/mnt/c/lamp/www/Portfolio/html/node_modules/gulp/node_modules/vinyl-fs/node_modules/glob-watcher/node_modules/gaze/lib/gaze.js:74:10)        

o meu gulpfile esta da seguinte forma:

const gulp = require('gulp');
const sass = require('gulp-ruby-sass');

gulp.task('sass', function(){
  sass('sass/**/*.sass')
      .on('error', sass.logError)
      .pipe(gulp.dest('css/'));
});

gulp.task('watch', function() {
        gulp.watch('sass/**/*.sass', ['sass']);
});

não entendo muito de gulp
estou usando o bash do ubuntu on windows

[tacios53]

não é um problema de permissões de arquivo já usei o comando chmod 777 para todos os arquivos na pasta