{
  description = "wutzcalc — festival drink tracker dev shell (https://git.berlin.ccc.de/vinzenz/wutzcalc)";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

  outputs = { self, nixpkgs }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f {
        inherit system;
        pkgs = import nixpkgs { inherit system; };
      });
    in {
      devShells = forAllSystems ({ pkgs, system }: {
        default = pkgs.mkShell {
          packages = with pkgs; [
            nodejs_20
            pnpm
            sqlite
            sqlite-interactive
            python3
            pkg-config
            gcc
            gnumake
          ];

          shellHook = ''
            echo "wutzcalc dev shell"
            echo "  node    $(node --version)"
            echo "  pnpm    $(pnpm --version)"
            echo "  sqlite  $(sqlite3 --version | cut -d' ' -f1)"
          '';
        };
      });
    };
}