{
  description = "AoC 2022 in Haskell";

  inputs = {
    nixpkgs.url = github:nixos/nixpkgs/release-22.05;
    utils.url = github:numtide/flake-utils;
  };

  outputs = { self, nixpkgs, utils }:
    utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = import nixpkgs {
            inherit system;
          };
          src = ./.;
        in
        with pkgs; {
          devShells.default = mkShell {
            buildInputs = [
              ghc
              haskell-language-server
            ];
          };
          apps.default = {
            type = "app";
            program = "${ghc}/bin/runhaskell";
          };
        }
      );
}