Hello! I am having an hard time testing grafts in GNU Guix while I think we could have better tooling around this. For example, we could have a package transformation that can add a phase before 'check (or others) to graft any intermediate build binary and all dependencies (if not done already) to run the test suite WITH the graft. This could be turned on by GNU Guix contributors after trying to graft some package to ensure it does not break things. What do you think? Léo