gulp postcss rem to pixel fall back - gulp

Question

I'm trying to set up a gulp task to process rem unit automatically and add a pixel fallback.
Here is my gulfile.js:
// NPM install gulp gulp-less gulp-watch gulp-plumber gulp-livereload gulp-postcss autoprefixer-core css-mqpacker csswring --save-dev
// explanation task breakdown: http://stackoverflow.com/questions/23953779/gulp-watch-and-compile-less-files-with-import
var gulp = require('gulp');
var less = require('gulp-less');
var watch = require('gulp-watch');
var plumber = require('gulp-plumber');
var livereload = require('gulp-livereload');
var path = require('path');
var postcss = require('gulp-postcss');
var autoprefixer = require('autoprefixer-core');
var mqpacker = require('css-mqpacker');
var csswring = require('csswring');
var pixrem = require('gulp-pixrem');
gulp.task('less', function() {
var processors = [
autoprefixer({browsers: ["last 8 version", "> 1%", "ie 9", "ie 8", "ie 7", "ios 6"]}),
mqpacker,
csswring({
preserveHacks: true,
removeAllComments: true
})
];
gulp.src('./style.less') // only compile the entry file
.pipe(plumber())
.pipe(less({
paths: ['./','./vendors/', './layouts', './partials/', './overrides/']
} ))
.pipe(pixrem('10px'))
.pipe(postcss(processors))
.pipe(plumber.stop())
.pipe(gulp.dest('./'))
.pipe(livereload());
});
gulp.task('watch', function() {
gulp.watch('./**/*.less', ['less']); // Watch all the .less files, then run the less task
});
gulp.task('default', ['watch']); // Default will run the 'entry' watch task
The task is now running and converting rems to pixel fallbacks thanks to gulp-pixrem.
The thing I can't seem to enable is switching the default root value. .pipe(pixrem('10px')) or .pipe(pixrem({rootvalue: '10px'}) doesn't change the base unit conversion.
.pipe(pixrem({ rootvalue: '10px' })) actually return an error TypeError in plugin gulp-pixrem Cannot read property '1' of null
Edit
Don't mind me.
.pipe(pixrem(100%)) is working fine.
End Edit

Answer 1

.pipe(pixrem(100%)) is working fine