Critical correctness bug in Lix

Here’s what I did on aarch64-darwin:

# check I was indeed affected
$ nix --version

# find last-known-good version. NOT 2.91.2, 2.92.2, or 2.93.1
$ ls /nix/store | grep '\-lix'

# 'up'grade nix to a previous, unaffected version
$ sudo nix upgrade-nix --store-path /store/path/to/old/abc123-lix-2.xx.x

# now you can follow the instructions to verify/repair
$ sudo su
(root) $ nix-store --version # just to be sure you are on the right version
(root) $ nix store ping # double check
(root) $ NIX_REMOTE=local nix-store --verify --repair

# In theory you can now upgrade nix. How you do this depends on whether
# you're on `nix-darwin`, `home-manager`, or a bare install. I am on a bare
# install, so I did:

$ nix upgrade-nix

# and to double check:
$ nix --version
nix (Lix, like Nix) 2.93.2
System type: aarch64-darwin

In practice, I ran into one (I think) unrelated bug which I’ve documented here.

Does this affect nix as well (e.g. nix 2.28.4), or is this lix-only?