fix(opencl): remove failing legacy build from t14g1 config

hosts/neon/configuration.nix

@@ -1,6 +1,11 @@
 # neon: thinkpad t14 gen1 (intel)
 
-{ inputs, ... }:
+{
+  inputs,
+  lib,
+  pkgs,
+  ...
+}:
 
 {
   imports = [
@@ -30,6 +35,16 @@
   # host-specific niri config (input devices, laptop binds)
   home-manager.users.aaron.imports = [ ./niri.nix ];
 
+  # nixos-hardware's intel module adds intel-compute-runtime-legacy1 (opencl),
+  # which isn't cached and currently fails to build; not needed on neon
+  hardware.graphics.extraPackages = lib.mkForce (
+    with pkgs;
+    [
+      intel-media-driver
+      vpl-gpu-rt
+    ]
+  );
+
   networking.hostName = "neon";
   system.stateVersion = "25.11"; # don't change
 }