module.exports = {
    options: {
      map: true, // inline sourcemaps

      processors: [
        require('pixrem')(), // add fallbacks for rem units
        require('autoprefixer-core')({
          // add vendor prefixes
          browsers: [
            'last 3 version',
            'ie 8',
            'ff 3.6',
            'opera 11.1',
            'ios 4',
            'android 2.3'
          ]
        }),
        require('cssnano')() // minify the result
      ]
    },
    dist: {
      src: '<%= destCSSDir %>' + '/*.css'
    }
};

@@ -436,16 +436,58 @@
 snano')(
+%7B%0A          convertValues: false%0A        %7D
 ) // min

Disable not-safe PostCSS value conversions