My flakeless configuration for macOS

To install run

nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgs
nix-channel --add https://github.com/LnL7/nix-darwin/archive/master.tar.gz darwin
nix-channel --add https://github.com/oxalica/rust-overlay/archive/master.tar.gz rust-overlay
nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
nix-channel --update
darwin-rebuild switch