{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    gitignore = {
      url = "github:hercules-ci/gitignore.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    self,
    nixpkgs,
    gitignore,
  }: let
    inherit (gitignore.lib) gitignoreSource;
    supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    nixpkgsFor =
      forAllSystems (system:
      import nixpkgs {
          config.allowUnfree = true;
          inherit system;
      });
  in {
    devShell = forAllSystems (system: let
      pkgs = nixpkgsFor.${system};
    in
      pkgs.mkShell {
        nativeBuildInputs = [
          pkgs.typst
          pkgs.ghc
          pkgs.pandoc
        ];
      });

    formatter = forAllSystems (system: nixpkgsFor.${system}.alejandra);
  };
}