nixos-install does not have rmdir in PATH

[jelle-bigbridge]

Describe the bug

I'm trying to run nixos-install on a debian system. (Specifically the Hetzner linux64 rescue system) And I get an error about rmdir not being available

Steps To Reproduce

Steps to reproduce the behavior:

1. Use a non-nixos installer system.
2. Run a nixos-install command from the nixos-install-tools package
3. The installer tries to install grub
4. Something unrelated goes wrong (I was installing on an arm system, so it tried to install the arm64-efi platform and I didn't have an EFI directory)
5. /nix/var/nix/profiles/system/sw/bin/bash: line 10: rmdir: command not found

Expected behavior

I guess rmdir should still work, so coretutils should be in PATH

Screenshots

Additional context

I'm using packer to create a nixos image on hetzner cloud

Notify maintainers

nixos-install-tools has no maintainers according to search.nixos.org

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

The machine is ephemeral, so I couldn't run this

[jelle-bigbridge]

Hmm it actually seems that rmdir is still needed if the installation went succesfully:

[nicolaslt]

There's a newer bug report that feels like it's about the same problem, and has some pointers: #241356