It seems that for whatever reason using https://install.lix.systems/lix as source-url on macOS returns permission denied like so: https://github.com/hazelweakly/nixos-configs/actions/runs/9877071030/job/27278362955

Further, @grahamc tweeted about using it with the binary package. So I think it actually is for the binary package. But then you have to inject the platform into that string, which is kind of ugly. https://x.com/grhmc/status/1787469491430989912

I am not sure why the permission denied error happened. The part that's especially confusing with that is that the lix-installer.sh does not include the string "nix-installer" anywhere which means that whatever broke here was actually in nix-installer-action as far as I can tell.