diff --git a/pkgs/development/libraries/gtk/2.x.nix b/pkgs/development/libraries/gtk/2.x.nix
index d13e3636bae..be5f8521f9c 100644
--- a/pkgs/development/libraries/gtk/2.x.nix
+++ b/pkgs/development/libraries/gtk/2.x.nix
@@ -12,12 +12,9 @@ assert cupsSupport -> cups != null;
 
 with stdenv.lib;
 
-let
-  pname = "gtk+";
-  version = "2.24.32"; # remove passthru on next update
-in
 stdenv.mkDerivation rec {
-  name = "${pname}-${version}";
+  pname = "gtk+";
+  version = "2.24.32";
 
   src = fetchurl {
     url = "mirror://gnome/sources/gtk+/2.24/${pname}-${version}.tar.xz";
@@ -75,8 +72,6 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    # passthru to prevent rebuild but allow pname and version
-    inherit pname version;
     gtkExeEnvPostBuild = ''
       rm $out/lib/gtk-2.0/2.10.0/immodules.cache
       $out/bin/gtk-query-immodules-2.0 $out/lib/gtk-2.0/2.10.0/immodules/*.so > $out/lib/gtk-2.0/2.10.0/immodules.cache