nixberry: add hostplatform

systems/aarch64-linux/nixberry/default.nix

@@ -4,6 +4,7 @@
   lib,
   modulesPath,
   namespace,
+  pkgs,
   ...
 }:
 
@@ -16,9 +17,12 @@ in
 {
   imports = with inputs.nixos-hardware.nixosModules; [
     (modulesPath + "/installer/scan/not-detected.nix")
-    raspberry-pi-5
   ];
 
+  nixpkgs.hostPlatform = {
+    system = "aarch64-linux";
+  };
+
   services.tailscale = {
     enable = true;
     useRoutingFeatures = "server";
@@ -149,6 +153,8 @@ in
       remotebuild = enabled;
     };
 
+    apps.cli-apps.helix.pkg = pkgs.helix;
+
     system = {
       # cachemiss for webkit gtk
       hardware.networking.enable = mkForce false;