{
  description = "Description for the project";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    devshell.url = "github:numtide/devshell";
  };

  outputs = inputs@{ flake-parts, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      imports = [
        inputs.devshell.flakeModule
      ];
      systems = [ "x86_64-linux" "aarch64-darwin" ];
      perSystem = { config, self', inputs', pkgs, system, ... }: {
        devshells.default = {
          env = [{
            name = "HTTP_PORT";
            value = 8080;
          }];
          commands = [
          {
            help = "deploy slides";
            name = "deploy";
            command = ''
              ssh genesis "mkdir -p /var/www/public/sudoku-snark"
              rsync -r --delete ./public/* genesis:/var/www/public/sudoku-snark/
              '';
          }
          {
            help = "serve slides";
            name = "serve";
            command = ''
              caddy file-server --listen :7777 --root ./public
              '';
          }
          {
            help = "build slides";
            name = "build";
            command = ''
              pandoc -t revealjs \
                --from markdown+yaml_metadata_block+link_attributes \
                -H src/header.html \
                -o public/index.html \
                -s \
                src/index.md
              '';
          }
          ];
          packages = with pkgs; [ pandoc nixfmt caddy ];
        };
      };
      flake = {
      };
    };
}