Raspberry Pi images that support Tailscale and headless SSH can be built using a command. It is easiest to run this command on AArch64 on Linux, such as within a Linux VM or Docker container on an M1 Mac.
docker run -v $PWD:/src -it --rm nixos/nix:latest /bin/sh
nix-env -f https:/nix-community/nixos-generators/archive/master.tar.gz -i
cd /src
nixos-generate -f sd-aarch64-installer --system aarch64-linux -c hosts/microserver.home.ts.hillion.co.uk/default.nix
cp SOME_OUTPUT out.img.zst
Alternatively, a Raspberry Pi image with headless SSH can be easily built using the logic in this repo.