{
  description = "Main library for my webpage";
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs";
    flake-utils.url = "github:numtide/flake-utils";
    nix-filter.url = "github:numtide/nix-filter";
  };

  outputs = { self, nixpkgs, flake-utils, nix-filter, ... }: {

    overlays.default = import ./nix/overlay.nix { inherit nix-filter; };

  } // flake-utils.lib.eachDefaultSystem (system: let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [ self.overlays.default ];
      };
    in {
      packages = {
        inherit (pkgs) site;
        default = pkgs.site;
      };

      devShells.default = pkgs.haskellPackages.shellFor {
        packages = _: [];
        # packages = p: [ p.www-main ];
        withHoogle = true;
        buildInputs = with pkgs.haskellPackages; [
          cabal-install
          hpack
          pkgs.zlib
        ];
      };
    });
}