{
  inputs.nixpkgs.url = "github:nixos/nixpkgs";

  outputs = { self, nixpkgs, flake-utils, fenix }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ fenix.overlays.default ];
        };

        toolchain = pkgs.fenix.stable;

        flakePkgs = rec {
          # client = pkgs.callPackage ./client { inherit toolchain; };
          NetAsyncHTTPServer =
            pkgs.perl536Packages.callPackage ./nix/NetAsyncHTTPServer.nix { };
        };
      in {
        packages = flake-utils.lib.flattenTree flakePkgs;

        devShell = pkgs.mkShell {
          # inputsFrom = with flakePkgs; [ client ];

          packages =
            (with pkgs; [ pkg-config perl openssl protobuf clang-tools ])
            ++ (with toolchain; [
              rustc
              cargo

              # Get the nightly version of rustfmt so we can wrap comments
              pkgs.fenix.default.rustfmt
            ]);
          # ++ (with pkgs.perl536Packages; [
          #   CPAN
          #   EmailMIME
          #   CryptEd25519
          #   DigestSHA1
          #   DigestHMAC
          #   DataDump
          #   EmailAddressXS
          #   FileSlurper
          #   Future
          #   IOAsync
          #   IOAsyncSSL
          #   JSON
          #   ListUtilsBy
          #   ModulePluggable
          #   NetAsyncHTTP
          #   flakePkgs.NetAsyncHTTPServer

          LIBRARY_PATH = pkgs.lib.concatStringsSep ":" [ "${pkgs.zlib}/lib" ];

          PKG_CONFIG_PATH = pkgs.lib.concatStringsSep ":" [
            "${pkgs.gnome.libsoup.dev}/lib/pkgconfig"
            "${pkgs.webkitgtk.dev}/lib/pkgconfig"
            "${pkgs.gtk3.dev}/lib/pkgconfig"
            "${pkgs.gtk4.dev}/lib/pkgconfig"
            "${pkgs.glib.dev}/lib/pkgconfig"
            "${pkgs.cairo.dev}/lib/pkgconfig"
            "${pkgs.gdk-pixbuf.dev}/lib/pkgconfig"
            "${pkgs.pango.dev}/lib/pkgconfig"
            "${pkgs.harfbuzz.dev}/lib/pkgconfig"
            "${pkgs.at-spi2-atk.dev}/lib/pkgconfig"
            "${pkgs.zlib.dev}/lib/pkgconfig"
          ];
        };
      });
}