diff --git a/pkgs/development/libraries/science/math/trilinos/default.nix b/pkgs/development/libraries/science/math/trilinos/default.nix
index 19d2119622e9..1939b0a5307b 100644
--- a/pkgs/development/libraries/science/math/trilinos/default.nix
+++ b/pkgs/development/libraries/science/math/trilinos/default.nix
@@ -59,7 +59,9 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "trilinos";
-  version = "12.12.1"; # Xyce 7.4 requires version 12.12.1
+  # Xyce 7.4 requires version 12.12.1
+  # nixpkgs-update: no auto update
+  version = "12.12.1";
 
   src = fetchFromGitHub {
     owner = "trilinos";