Config grunt-webfont task under Windows O.S.

Gruntfile.js

module.exports = function(grunt) {

    'use strict';

    // load all grunt-* task listed in package.json in one line.
    require('load-grunt-tasks')(grunt);

    // Project configuration.
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        webfont: {
            icons: {
                src: 'app/svg/*.svg',
                dest: 'dist/fonts',
                destCss: 'dist/styles',
                options: {
                    engine: 'node', // needed for webfont generation with Windows
                    stylesheet: 'less'
                }
            }
        }
    });

    // This is the default task being executed if Grunt
    // is called without any further parameter.
    grunt.registerTask('default', ['webfont']);

};

package.json

{
    "name": "test",
    "version": "0.0.0",
    "private": true,
    "devDependencies": {
        "load-grunt-tasks": "~1.0.0",
        "grunt": "~0.4.2",
        "grunt-webfont": "~0.4.8"
    }
}