Use compass for compiling Sass files

Anyone knows how to include Compass in compiling Sass in Ionic?

Everytime I do ionic serve it gives me an error: [gulp-sass] file to import not found or unreadable: compass

Here's my Gulp task:

gulp.task('sass', function(done) {
  gulp.src('./scss/ionic.app.scss')
    .pipe(sass({
      compass: true,
      errLogToConsole: true
    }))
    .pipe(gulp.dest('./www/css/'))
    .pipe(minifyCss({
      keepSpecialComments: 0
    }))
    .pipe(rename({ extname: '.min.css' }))
    .pipe(gulp.dest('./www/css/'))
    .on('end', done);
});

I've also done npm install -g gulp-compass it still doesn't work.

Thanks