{
  description = "A very basic Haskell flake";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };


  outputs = { self, nixpkgs, ...}: 
  let
    supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    pkgs = forAllSystems (system: nixpkgs.legacyPackages.${system});
  in
  {
    devShells = forAllSystems (system: {
      default = pkgs.${system}.callPackage ./shell.nix {};
    });
  };
}