https://gerrit.lix.systems/c/lix/+/4679

So the issue is I'm trying to bump lix to nixos-25.11-small, two questions:

1. nix 2.3 has been removed from nixpkgs, should we removed it too or we still want it?
2. the only way I have found to bring back nix_2_3 in the setup is to have a copy of nixpkgs 25.05 because I wasn't able to make it work like 2.18 is setup, I'm wondering if this can cause the issue I'm facing here.

Flag me if I'm wrong but it's weird that we allow ipc-posix* but don't allow ipc-sysv in the macOS sandbox. I've asked about it in the Nix on macOS channel as well but here's a cl for now:

https://gerrit.lix.systems/c/lix/+/4681