I think it may not be handled automatically. Looks like you could use find /System/Index | RemoveBroken and then you'd have to use SymlinkProgram to enable

I think it may not be handled automatically. Looks like you could use find /System/Index | RemoveBroken and then you'd have to use SymlinkProgram to enable another provider of the shared libraries. In a way this is inside-out from what Nix and Guix do, where their equivalent of the System Index (the Nix/Guix store) is the build target, and everything all symlinks point to that. That makes this kind of thing a little easier to deal with, at some other costs.