From 820a197b5fee32f946f7cfba2010ce28c8d07a4f Mon Sep 17 00:00:00 2001
From: Luka Blaskovic <lblasc@tvbeat.com>
Date: Mon, 12 Aug 2019 12:42:59 +0000
Subject: [PATCH] gnum4: fix build with glibc>=2.28

---
 pkgs/development/tools/misc/gnum4/default.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/tools/misc/gnum4/default.nix b/pkgs/development/tools/misc/gnum4/default.nix
index ab2ab0de9cf9..b01f85bb4a7a 100644
--- a/pkgs/development/tools/misc/gnum4/default.nix
+++ b/pkgs/development/tools/misc/gnum4/default.nix
@@ -13,7 +13,14 @@ stdenv.mkDerivation {
   configureFlags = [ "--with-syscmd-shell=${stdenv.shell}" ];
 
   # Upstream is aware of it; it may be in the next release.
-  patches = [ ./s_isdir.patch ]
+  patches =
+    [
+      ./s_isdir.patch
+      (fetchurl {
+        url = "https://sources.debian.org/data/main/m/m4/1.4.18-2/debian/patches/01-fix-ftbfs-with-glibc-2.28.patch";
+        sha256 = "12lmdnbml9lfvy0khpjc42riicddaz7li8wmbnsam7zsw6al11qk";
+      })
+    ]
     ++ stdenv.lib.optional stdenv.isDarwin ./darwin-secure-format.patch;
 
   meta = {