How to install nix to use in nix-darwin:
curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | \
sh -s -- install
You will need to explicitly say no when prompted to install Determinate Nix
How to install homebrew:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
How to run nix-darwin:
nix run nix-darwin/master#darwin-rebuild -- switch --flake .#mac-mini