[tyrankh]

> Maybe that's what vgo needs, a way to specify a conflict bound

This is a valid idea; you should make a proposal or issue for it. Alternatively, it seems like something that would be easy to add separately - I personally like the idea of vgo as more of a simple, unix-like building block that you'd build on top of. Adding a small utility CLI checks incompatibilities with `vgo list` + some incompatibilities.txt file would be pretty easy.