fix: LLM-Agents overlay

overlays/default.nix

@@ -7,7 +7,7 @@
   # This one contains whatever you want to overlay
   # You can change versions, add patches, set compilation flags, anything really.
   # https://nixos.wiki/wiki/Overlays
-  modifications = final: prev: {
+  modifications = _final: _prev: {
     #   n8n = import ./mods/n8n.nix {inherit prev;};
 
     #   brave = prev.brave.override {
@@ -64,15 +64,36 @@
   # recursion that occurs when accessing final/prev.system while the fixed-point
   # is still being computed.  Exposed via outputs.lib, not outputs.overlays.
   #
-  # Filters out the 16 internal helpers (marked `passthru.hideFromDocs = true`
+  # Use llm-agents' shared-nixpkgs overlay so packages with optional GPU support
+  # (notably qmd) are built against this system's pkgs/config. Using the flake's
+  # pre-built `packages.${system}` set pins them to llm-agents' own nixpkgs,
+  # where allowUnfree is false; qmd.override { cudaSupport = true; } then fails
+  # on CUDA EULA packages during the m3-ares NVIDIA specialisation build.
+  #
+  # Keep the exposed top-level package names aligned with llm-agents' filtered
+  # flake packages, but take the package values from the shared package set.
+  # Filters out internal helpers (marked `passthru.hideFromDocs = true`
   # upstream) that would otherwise clobber nixpkgs attributes. Most critically
   # this excludes `buildNpmPackage` — llm-agents' buildNpmPackage is a guarded
   # re-export whose `__functor`/`override` interaction with makeOverridable
   # breaks any package (e.g. nixpkgs' webcord) that calls
   # `buildNpmPackage.override { nodejs = ...; }`. See numtide/llm-agents.nix
   # commit 40490259 and the wrapper at packages/buildNpmPackage/package.nix.
-  mkLlmAgentsOverlay = system: _final: _prev:
-    builtins.removeAttrs (inputs.llm-agents.packages.${system} or {}) [
+  mkLlmAgentsOverlay = system: final: prev: let
+    sharedPackages = (inputs.llm-agents.overlays.shared-nixpkgs final prev).llm-agents or {};
+    exposedPackageNames =
+      builtins.filter
+      (name: inputs.nixpkgs.lib.hasAttrByPath [name] sharedPackages)
+      (builtins.attrNames (inputs.llm-agents.packages.${system} or {}));
+    exposedPackages =
+      builtins.listToAttrs
+      (map (name: {
+          inherit name;
+          value = sharedPackages.${name};
+        })
+        exposedPackageNames);
+  in
+    builtins.removeAttrs exposedPackages [
       # Internal helpers from packages/* marked hideFromDocs upstream:
       "antigravity"
       "auto-claude"