added various build artifacts for the tundra dev env

hosts/packages/tundra/flake.nix

@@ -0,0 +1,42 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    astal.url = "github:aylur/astal";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    astal,
+  }: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in {
+    packages.${system} = {
+      default = pkgs.stdenv.mkDerivation {
+        name = "tundra";
+        src = ./.;
+
+        nativeBuildInputs = with pkgs; [
+          meson
+          ninja
+          pkg-config
+          vala
+          gobject-introspection
+          dart-sass
+        ];
+
+        buildInputs = [
+          astal.packages.${system}.io
+          astal.packages.${system}.astal3
+          astal.packages.${system}.battery
+          astal.packages.${system}.wireplumber
+          astal.packages.${system}.network
+          astal.packages.${system}.tray
+          astal.packages.${system}.mpris
+          astal.packages.${system}.hyprland
+        ];
+      };
+    };
+  };
+}