module.exports = {
  plugins: {
    'postcss-import': {},
    'autoprefixer': {},
    'cssnano': {},
  }
}

module.exports = {
  plugins: {
    'postcss-import': {},
    'autoprefixer': {},
    'cssnano': {
      'zindex': false
    },
  }
};

Disable z-index modification [WAL-934]