From 044898625d342b2ed850f3126f4fa83d6211b1c8 Mon Sep 17 00:00:00 2001
From: Kirill Radzikhovskyy <kirillrdy@gmail.com>
Date: Sat, 24 Oct 2026 09:01:04 +0900
Subject: [PATCH] zig: remove unused LLVM and Clang references from closure

---
 pkgs/development/compilers/zig/generic.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/pkgs/development/compilers/zig/generic.nix b/pkgs/development/compilers/zig/generic.nix
index 70076fbc9913..a377293128fb 100644
--- a/pkgs/development/compilers/zig/generic.nix
+++ b/pkgs/development/compilers/zig/generic.nix
@@ -7,6 +7,7 @@
   xcbuild,
   libxml2,
   ninja,
+  removeReferencesTo,
   zlib,
   coreutils,
   callPackage,
@@ -35,6 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     cmake
     (lib.getDev llvmPackages.llvm.dev)
     ninja
+    removeReferencesTo
   ]
   ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # provides xcode-select, which is required for SDK detection
@@ -119,6 +121,19 @@ stdenv.mkDerivation (finalAttrs: {
     install -Dm444 ../zig-out/doc/langref.html -t $doc/share/doc/zig-${finalAttrs.version}/html
   '';
 
+  # Drop unused LLVM/Clang paths left by static linking.
+  postFixup = ''
+    remove-references-to \
+      -t ${lib.getLib llvmPackages.llvm} \
+      -t ${lib.getLib llvmPackages.libclang} \
+      $out/bin/zig
+  '';
+
+  disallowedReferences = [
+    (lib.getLib llvmPackages.llvm)
+    (lib.getLib llvmPackages.libclang)
+  ];
+
   doInstallCheck = true;
   installCheckPhase = ''
     runHook preInstallCheck