Why is compass not working in gulp?

Question

Sass

Hello, please help me to solve this problem. When running GULP, sass compiles fine, but the compass mixin doesn't want to work. Writes: "Error: error scss/main.scss (Line 3: Undefined mixin 'text-shadow'.)" .
gulpfile.js

var gulp = require('gulp'),
    compass = require('gulp-compass');
 
gulp.task('compass', function() {
  gulp.src('scss/*.scss')
    .pipe(compass({
      config_file: 'config.rb',
      css: 'stylesheets',
      sass: 'scss'
    }))
    .pipe(gulp.dest('scss'));
});

config.rb

preferred_syntax = :sass
http_path = "/"
css_dir = 'stylesheets'
sass_dir = 'scss'
relative_assets = true
line_comments = true

main.scss

h1 {
  color: green;
  @include text-shadow(rgba(blue, 0.2) 1px 1px 0, rgba(blue, 0.2) 2px 2px 0, rgba(blue, 0.2) 3px 3px 0);

}

Answer 1

Gulp certainly has nothing to do with it. Did you include import "compass/css3"?