{
  inputs = {
    nixpkgs.url = "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz";
  };
  outputs =
    { nixpkgs, ... }@inputs:
    let
      inherit (inputs.nixpkgs) lib;
      forAllSystems =
        body: lib.genAttrs lib.systems.flakeExposed (system: body nixpkgs.legacyPackages.${system});
    in
    {
      devShells = forAllSystems (pkgs: {
        default = pkgs.mkShell {
          packages = with pkgs; [
            zig_0_15
            qemu
          ];
        };
      });

      formatter = forAllSystems (pkgs: pkgs.nixfmt-rfc-style);
    };
}