diff --git a/pkgs/development/libraries/glibc/2.32-master.patch.gz b/pkgs/development/libraries/glibc/2.32-master.patch.gz
index bd99c36d741..bcf4d13443c 100644
Binary files a/pkgs/development/libraries/glibc/2.32-master.patch.gz and b/pkgs/development/libraries/glibc/2.32-master.patch.gz differ
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index b3862cc5c0b..7a83ffd36d7 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -42,7 +42,7 @@
 
 let
   version = "2.32";
-  patchSuffix = "-39";
+  patchSuffix = "-40";
   sha256 = "0di848ibffrnwq7g2dvgqrnn4xqhj3h96csn69q4da51ymafl9qn";
 in
 
@@ -59,12 +59,13 @@ stdenv.mkDerivation ({
 
   patches =
     [
-      /* No tarballs for stable upstream branch, only https://sourceware.org/git/glibc.git
-         and using git or something would complicate bootstrapping.
-         Fortunately it's not too big.
-          $ git checkout origin/release/2.32/master; git describe
-          glibc-2.32-39-g44b3959329
-          $ git show --reverse glibc-2.32.. | gzip -n -9 --rsyncable - > 2.32-master.patch.gz
+      /* No tarballs for stable upstream branch, only https://sourceware.org/git/glibc.git and using git would complicate bootstrapping.
+          $ git fetch --all -p && git checkout origin/release/2.32/master && git describe
+          glibc-2.32-40-g778b8d3786
+          $ git show --minimal --reverse glibc-2.32.. | gzip -9n --rsyncable - > 2.32-master.patch.gz
+
+         To compare the archive contents zdiff can be used.
+          $ zdiff -u 2.32-master.patch.gz ../nixpkgs/pkgs/development/libraries/glibc/2.32-master.patch.gz
        */
       ./2.32-master.patch.gz