I often find that DRY is in conflict with Conway's law[1]. It's almost always better to let Conway's law win. If I help write a build script for one team, I often copy and paste it into another's git repo to instead of trying to share it. It's often way better than factoring it poorly[2] or getting the two teams to coordinate on changes they need to make to it. Best to let the two copies diverge in that case.

1: https://www.wingolog.org/archives/2015/11/09/embracing-conwa...

2: https://sandimetz.com/blog/2016/1/20/the-wrong-abstraction