diff --git a/pkgs/development/libraries/glibc-nptl/default.nix b/pkgs/development/libraries/glibc-nptl/default.nix
index dbc49cd4a50..7616c07a492 100644
--- a/pkgs/development/libraries/glibc-nptl/default.nix
+++ b/pkgs/development/libraries/glibc-nptl/default.nix
@@ -4,7 +4,7 @@
 }:
 
 stdenv.mkDerivation {
-  name = "glibc-2.5";
+  name = "glibc-2.5-nptl";
   builder = ./builder.sh;
 
   src = fetchurl {