You should read this: https://caremad.io/posts/2013/07/setup-vs-requirement/ https://caremad.io/posts/2013/07/setup-vs-requirement/, it specifically references

You should read this: https://caremad.io/posts/2013/07/setup-vs-requirement/ https://caremad.io/posts/2013/07/setup-vs-requirement/, it specifically references this "feature" of pbr.