From 8b72746f6697354a8ecdfb18ded7bfb711a0b006 Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Tue, 7 Apr 2026 21:32:48 -0400
Subject: [PATCH] libarchive: set am_cv_func_iconv_works to yes on darwin

---
 pkgs/by-name/li/libarchive/package.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/by-name/li/libarchive/package.nix b/pkgs/by-name/li/libarchive/package.nix
index ae21de10f245..5c1ae26fcf26 100644
--- a/pkgs/by-name/li/libarchive/package.nix
+++ b/pkgs/by-name/li/libarchive/package.nix
@@ -112,6 +112,13 @@ stdenv.mkDerivation (finalAttrs: {
 
   configureFlags = lib.optional (!xarSupport) "--without-xml2";
 
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
+    # macOS iconv implementation is slightly broken since Sonoma
+    # https://github.com/Homebrew/homebrew-core/pull/199639
+    # https://savannah.gnu.org/bugs/index.php?66541
+    am_cv_func_iconv_works = "yes";
+  };
+
   # https://github.com/libarchive/libarchive/issues/1475
   doCheck = !stdenv.hostPlatform.isMusl;