{
  description = "Basic project";
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  outputs = { self, nixpkgs }:
    let
      forAllSystems = nixpkgs.lib.genAttrs [
        "x86_64-linux"
        "x86_64-darwin"
        "aarch64-linux"
        "aarch64-darwin"
      ];
    in {
      devShells = forAllSystems (system:
        let pkgs = import nixpkgs { inherit system; };
        in {
          default = pkgs.mkShell { buildInputs = with pkgs; [ nixfmt ]; };
        });
    };
}