diff --git a/pkgs/by-name/un/untie/add-define-gnu-source.patch b/pkgs/by-name/un/untie/add-define-gnu-source.patch
new file mode 100644
index 000000000000..aaaf99149e31
--- /dev/null
+++ b/pkgs/by-name/un/untie/add-define-gnu-source.patch
@@ -0,0 +1,12 @@
+diff --git a/untie.c b/untie.c
+index f08a10d..d3d20b4 100644
+--- a/untie.c
++++ b/untie.c
+@@ -18,6 +18,7 @@
+  * Copyright (c) 2006, 2007 Guillaume Chazarain <guichaz@yahoo.fr>
+  */
+ 
++#define _GNU_SOURCE
+ #include <sys/time.h>
+ #include <sys/resource.h>
+ #include <sys/wait.h>
diff --git a/pkgs/by-name/un/untie/package.nix b/pkgs/by-name/un/untie/package.nix
index 9dee6d7e422d..8ef7c90e5e3e 100644
--- a/pkgs/by-name/un/untie/package.nix
+++ b/pkgs/by-name/un/untie/package.nix
@@ -4,22 +4,27 @@
   fetchurl,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "untie";
   version = "0.3";
   src = fetchurl {
-    url = "http://guichaz.free.fr/untie/files/${pname}-${version}.tar.bz2";
+    url = "http://guichaz.free.fr/untie/files/${finalAttrs.pname}-${finalAttrs.version}.tar.bz2";
     sha256 = "1334ngvbi4arcch462mzi5vxvxck4sy1nf0m58116d9xmx83ak0m";
   };
 
+  patches = [
+    # fix build with gcc14
+    ./add-define-gnu-source.patch
+  ];
+
   makeFlags = [ "PREFIX=$(out)" ];
 
-  meta = with lib; {
+  meta = {
     description = "Tool to run processes untied from some of the namespaces";
     mainProgram = "untie";
-    maintainers = with maintainers; [ raskin ];
-    platforms = platforms.linux;
-    license = licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [ raskin ];
+    platforms = lib.platforms.linux;
+    license = lib.licenses.gpl2Plus;
   };
 
   passthru = {
@@ -27,4 +32,4 @@ stdenv.mkDerivation rec {
       downloadPage = "http://guichaz.free.fr/untie";
     };
   };
-}
+})