Autoprefixer not prefixing transform

gulpfile.js

var gulp = require('gulp');
var compass = require('gulp-compass');
var autoprefixer = require('gulp-autoprefixer');
var minifyCSS = require('gulp-minify-css');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var concat = require('gulp-concat');
var notify = require('gulp-notify');
var livereload = require('gulp-livereload');
var plumber = require('gulp-plumber');
var path = require('path');

var notifyInfo = {
  title: 'Gulp',
  icon: path.join(__dirname, 'gulp.png')
};

var plumberErrorHandler = {
  errorHandler: notify.onError({
    title: notifyInfo.title,
    icon: notifyInfo.icon,
    message: "Error: <%= error.message &>"
  })
};

gulp.task('styles', function () {
  return gulp.src(['src/scss/**/*.scss'])
    .pipe(plumber(plumberErrorHandler))
    .pipe(compass({
      css: 'css',
      sass: 'src/scss',
      image: 'img'
    }))
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 7', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(gulp.dest('css'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(minifyCSS())
    .pipe(gulp.dest('css'));
});

gulp.task('scripts', function () {
  return gulp.src('src/js/**/*.js')
    .pipe(plumber(plumberErrorHandler))
    .pipe(concat('main.js'))
    .pipe(gulp.dest('js'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(uglify())
    .pipe(gulp.dest('js'));
});

gulp.task('default', function () {
  livereload.listen();
  gulp.watch('src/scss/**/*.scss', ['styles']);
  gulp.watch('src/js/**/*.js', ['scripts']);

  gulp.watch(
    ['*.html',
    'css/*.css',
    'js/main.min.js'], function (event) {
      gulp.src(event.path)
        .pipe(plumber())
        .pipe(livereload())
        .pipe(notify({
          title: notifyInfo.title,
          icon: notifyInfo.icon,
          message: event.path.replace(__dirname, '').replace(/\\/g, '/') + ' was ' + event.type + ' and reloaded'
        })
      );
  });
});

package.json

{
  "name": "localrogo",
  "version": "1.0.0",
  "description": "",
  "main": "localrogo.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "thykka",
  "dependencies": {
    "chmod": "^0.2.1",
    "fs": "0.0.2",
    "fs-xattr": "^0.1.11",
    "mkdirp": "^0.5.1",
    "touch": "^1.0.0",
    "wrench": "^1.5.8"
  },
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-autoprefixer": "^3.1.0",
    "gulp-compass": "^2.1.0",
    "gulp-concat": "^2.6.0",
    "gulp-livereload": "^3.8.1",
    "gulp-minify-css": "^1.2.4",
    "gulp-notify": "^2.2.0",
    "gulp-plumber": "^1.1.0",
    "gulp-rename": "^1.2.2",
    "gulp-uglify": "^1.5.3"
  }
}

test.css

.derp {
  transform: translateX(-10%);
  -webkit-filter: blur(5px);
          filter: blur(5px);
}

test.scss

.derp {
  transform: translateX(-10%);
  filter: blur(5px);
}