transform property not getting prefixed

[thykka]

So i've been using the same gulp setup for many months, but today as I was updating an old project, I noticed it doesn't look right on Android (4.2). Turned out the compiled css was missing -webkit prefix for the transform property (which previously did receive the prefix as it should).

According to caniuse, this prefix is needed for all pre-5 Androids.

Here's my gulpfile and a simple test case, which demostrates the issue:
https://gist.github.com/thykka/b450db9742246245818807d7642e9247

There is no issue when using the same settings with the online autoprefixer though, which leads me to believe this problem is specific to either my config or gulp-autoprefixer itself.

Any ideas?

[SamVerschueren]

From the Readme

Issues with the output should be reported on the Autoprefixer issue tracker.

gulp-autoprefixer just calls autoprefixer. So if something is wrong, it should be reported to that repository.

[thykka]

Turns out my problem was caused by giving the browser versions as multiple arguments

.pipe(autoprefixer('last 2 versions', 'android 4'))

...instead of a single array

.pipe(autoprefixer(['last 2 versions', 'android 4']))