Missing prefix

[ndmitry]

Missing prefix

[nDmitry]

I think your prefixed files are saved to a project root due to this misconfiguration:

prefix_files: {
    expand: true,
    flatten: true,
    src: '<%= config.dist %>/*.css'
}

You should remove expand and flatten here.

[nhall]

I updated my gruntfile. Still doesn't prefix the transform. The CSS is wrapped in a media query @media (min-width: 37.5625em) { could that have anything to do with this?

[nDmitry]

I can't reproduce the issue with the exact same config and CSS, so the problem is somewhere in config file I believe.

[nhall]

Must be hanging on something else in my CSS. I pulled out just that code into individual CSS file and ran the same task. Prefixed it fine. Must be particular to something else in my project. Thanks.