vendors/tempy.js/fixWinEPERM
    var fixWinEPERM = (p, options, er, cb) => {
      assert(p);
      assert(options);
      assert(typeof cb === "function");
      options.chmod(p, 438, (er2) => {
        if (er2)
          cb(er2.code === "ENOENT" ? null : er);
        else
          options.stat(p, (er3, stats) => {
            if (er3)
              cb(er3.code === "ENOENT" ? null : er);
            else if (stats.isDirectory())
              rmdir(p, options, er, cb);
            else
              options.unlink(p, cb);
          });
      });
    };