From eee88b63531ffb0caa93dde08f44718ccf6052fc Mon Sep 17 00:00:00 2001
From: Palmer Cox <p@lmercox.com>
Date: Mon, 25 May 2026 21:58:02 -0400
Subject: [PATCH] cardpeek: Fix on Darwin

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

diff --git a/pkgs/by-name/ca/cardpeek/package.nix b/pkgs/by-name/ca/cardpeek/package.nix
index 895415be4780..15716189d1be 100644
--- a/pkgs/by-name/ca/cardpeek/package.nix
+++ b/pkgs/by-name/ca/cardpeek/package.nix
@@ -52,6 +52,13 @@ stdenv.mkDerivation {
   ]
   ++ lib.optional stdenv.hostPlatform.isLinux pcsclite;
 
+  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";
+  };
+
   enableParallelBuilding = true;
 
   meta = {