How can I use seperate mix.config.js to compile two version assets?

I wanna make two different versions app in the same project. So I use different master blade template.

They use different assets. For mobile version, I use zepto, For desktop version, jquery.

when I use mix to extract zepto or jquery to vendor. They will be extracted to the same vendor file. So I wanna use seperate mix.config.js, one for mobile version, one for desktop version.

How can I edit mix tool?