Disabling compass / scss datasource maps

I am using the latest sass and compass and using gulp-compass to build. I am getting .map

sourcemap files even though I set sourcemap=false

in config.rb and set option sourcemap:false

in gulp -compass options. I would like to sometimes turn off the sources to speed up the build. It takes roughly twice as long to run a gulp task when generating source maps. Any suggestions?

config.rb:

http_path = "/"
css_dir = "css"
sass_dir = "sass"
images_dir = "img"
javascripts_dir = "js"
sourcemap = false
output_style = ":compact"

      

        
        
        
      

    

gulp.js

gulp.task('compass', function() {
    return gulp.src(['sass/screen.scss', 'sass/screen_fallback.scss']).pipe(compass({
        config_file: 'config.rb',
        css: 'css',
        sass: 'sass',
        sourcemap: false
    })).on('error', function(err) {
        notify({
            message: err
        })
    }).pipe(notify({
        message: 'Compass processed.'
    })).pipe(minifycss()).pipe(rename({
        suffix: '.min'
    })).pipe(gulp.dest('css')).pipe(notify({
        message: 'CSS minified.'
    }));
});