text: const EOL = require('os').EOL;
  const relative = require('path').relative;
  
  /**
   * @param  {string[]} files
   * @param  {string}   cwd
   * @return {string}
   */
  module.exports = function concat(files, cwd) {
    return files.map(file => resolveImport(cwd, file)).join(EOL);
  };
  
  /**
   * @param  {string} cwd
   * @param  {string} filepath
   * @return {string}
   */
  function resolveImport(cwd, filepath) {
    return `@import "${relative(cwd, filepath)}";`;
  }
  