postCSS, webpack, antd and autoprefixes?

help
1

I’m having some problems with flexbox in safari 8 and need prefixes. Antd usually leverages webpack here, but is there a best practice for doing this in meteor?

https://github.com/sebakerckhof/meteor-autoprefix?

2

I found this as well:

How are others tackling prefixing? No flexbox in safari 8 is killing me!

3

I follow the meteor guide recommendations to get postcss working: