Hello,
You don’t have to downgrade node, changing the the order makes it work perfectly (calling less after scss)
.pipe(function() { return gulpif('*.scss', sass({ outputStyle: 'nested', // libsass doesn't support expanded yet precision: 10, includePaths: ['.'], errLogToConsole: !enabled.failStyleTask })); }) .pipe(function() { return gulpif('*.less', less()); })