From 8746d3caee7a256a2a1638da3e357ae666a6f47d Mon Sep 17 00:00:00 2001
From: Matthew Donoughe <mdonoughe@pm.me>
Date: Mon, 16 Feb 2026 17:28:13 -0500
Subject: [PATCH] glibc: set default zonedir to match fhs

---
 pkgs/development/libraries/glibc/common.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index 9b2946d019fb..533a4b453909 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -208,7 +208,12 @@ stdenv.mkDerivation (
 
     makeFlags =
       (args.makeFlags or [ ])
-      ++ [ "OBJCOPY=${stdenv.cc.targetPrefix}objcopy" ]
+      ++ [
+        "OBJCOPY=${stdenv.cc.targetPrefix}objcopy"
+        # zonedir does nothing on NixOS but is important for non-NixOS.
+        # See https://github.com/NixOS/nixpkgs/pull/491193
+        "zonedir=/usr/share/zoneinfo"
+      ]
       ++ lib.optionals (stdenv.cc.libc != null) [
         "BUILD_LDFLAGS=-Wl,-rpath,${stdenv.cc.libc}/lib"
         "OBJDUMP=${stdenv.cc.bintools.bintools}/bin/objdump"