{
  description = "Stefan Kreutz's personal website";

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

  outputs = inputs@{ self, nixpkgs, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
	pkgs = import nixpkgs {
	  inherit system;
	  config = { };
	  overlays = [ ];
	};
	src = builtins.path { path = ./.; name = "blog"; };
      in rec {
	# nix develop
	devShells.default = pkgs.mkShell {
	  nativeBuildInputs = with pkgs; [ ghc cabal-install lychee zlib ];
	};

	# nix build .
	# open ./result/srv/www.skreutz.com/index.html
	packages.default = packages.site;

	# nix run .#generator -- --help
	packages.generator = pkgs.haskell.lib.compose.justStaticExecutables (
	  pkgs.haskellPackages.callCabal2nix "blog" src { }
	);

	# nix build .#site
	packages.site = pkgs.callPackage ./site.nix {
	  inherit self;
	  inherit (packages) generator;
	};

	checks.links = pkgs.stdenvNoCC.mkDerivation {
	  inherit src;
	  name = "offline-link-check";
	  dontBuild = true;
	  doCheck = true;
	  nativeBuildInputs = with pkgs; [ lychee ];
	  checkPhase = ''
	    "${packages.generator}/bin/site" rebuild
	    lychee --offline --no-progress --require-https --root-dir "$( realpath _site )" _site
	  '';
	  installPhase = ''
	    mkdir $out
	  '';
	};
      }
    );
}