fix(nix): make nix run build reliably on macOS

[0xcaff]

No description provided.

[xkonjin]

Code Review

Summary: Fix for Nix build reliability on macOS by making libclang and perl available on all platforms and unconditionally setting LIBCLANG_PATH.

Strengths

• Addresses a legitimate cross-platform build issue
• The change is minimal and focused
• Good use of pkgs.lib.optionalals for Linux-specific dependencies

Issues & Suggestions

1. Missing documentation: The PR title and description don't explain why this change is needed or what the symptoms were. Add details about:

   • What error occurred before the fix
   • Why macOS needs these dependencies now
   • Any relevant issues this resolves

2. perl dependency unexplained: Adding perl to nativeBuildInputs is not mentioned in the PR. What is it used for? If it's required by cargo-tauri, document this dependency.

3. LIBCLANG_PATH now unconditional: The change removes the Linux-only conditional, setting LIBCLANG_PATH unconditionally. This might cause issues if the path doesn't exist on some systems. Consider:

   LIBCLANG_PATH = pkgs.lib.optionalString (pkgs.llvmPackages.libclang != null)
     "${pkgs.llvmPackages.libclang.lib}/lib";

   Or document why this is safe.

4. npmDepsHash update: The npmDepsHash changed from sha256-GWBewwZD6Q3wstZCvVYToiRHRPvrVQcPBJGJPvook6o= to sha256-YbHVvsYijeCw0FlTWx4yhvfNH+yHRAm7fcfYKG/SkU0=. This indicates a dependency change. What changed in package.json or lockfile? This should be mentioned in the PR description.

5. No tests: There's no way to verify this fix works across different macOS versions or Nix configurations. Consider adding a CI check or at least manual testing notes.

Security

• ✅ No security concerns

Minor

• The new apps.default definition is a nice quality-of-life improvement but wasn't mentioned in the PR description.

Recommendation: Request changes - Add documentation explaining the dependency changes, symptoms, and testing notes.