Using newer to compile parent Stylus files

Trying to use grunt-newer on a large enterprise site using Stylus, so that we only compile the files necessary, rather than all stylus files every time one is changed.

This is working great, however if a `.styl` file is updated that is imported into parent files, we need to update those as well. Any ideas on how to accomplish that without touching every file that has an `@import` call?