From 1470227ef41c4b101c77f3f1969d3978678215df Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Thu, 30 Sep 2021 19:23:43 +0200
Subject: [PATCH] postfix: fix build w/glibc-2.34

Failing Hydra build: https://hydra.nixos.org/build/154082134
---
 pkgs/servers/mail/postfix/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/servers/mail/postfix/default.nix b/pkgs/servers/mail/postfix/default.nix
index 08c55f771724..942023b4eaf4 100644
--- a/pkgs/servers/mail/postfix/default.nix
+++ b/pkgs/servers/mail/postfix/default.nix
@@ -1,5 +1,6 @@
 { stdenv, lib, fetchurl, makeWrapper, gnused, db, openssl, cyrus_sasl, libnsl
 , coreutils, findutils, gnugrep, gawk, icu, pcre, m4
+, fetchpatch
 , buildPackages, nixosTests
 , withLDAP ? true, openldap
 , withPgSQL ? false, postgresql
@@ -46,6 +47,12 @@ in stdenv.mkDerivation rec {
     ./postfix-3.0-no-warnings.patch
     ./post-install-script.patch
     ./relative-symlinks.patch
+
+    # glibc 2.34 compat
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/postfix/raw/2f9d42453e67ebc43f786d98262a249037f80a77/f/postfix-3.6.2-glibc-234-build-fix.patch";
+      sha256 = "sha256-xRUL5gaoIt6HagGlhsGwvwrAfYvzMgydsltYMWvl9BI=";
+    })
   ];
 
   postPatch = lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''