[Nullabillity]

> Does it work on macOS or Windows yet?

It runs fine on macOS. It works on WSL if you disable SQLite's write-ahead log (`echo "use-sqlite-wal = false" > /etc/nix/nix.conf` before installing), but it's much slower than running it on native Linux.

> What's the oldest Linux distro upon which it will run?

It brings its own libraries, so the primary question would be what kernel you use. I haven't verified any specific version, but you'll probably be fine. You might need to disable sandboxing though, since that makes pretty elaborate use of the various namespace systems.