diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 68677264587..ce1c090f12a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7696,18 +7696,18 @@ let
 
   namebench = buildPythonPackage (rec {
     name = "namebench-1.0.5";
-    disabled = isPy3k;
+    disabled = isPy3k || isPyPy;
 
     src = pkgs.fetchurl {
       url = "http://namebench.googlecode.com/files/${name}.tgz";
       sha256 = "6cbde35ce94d1f31e7d48f5d8eec13238b4dbc505675a33f1e183e600c1482c3";
     };
 
-    # No support of GUI yet.
-
     # error: invalid command 'test'
     doCheck = false;
 
+    propagatedBuildInputs = [ self.tkinter ];
+
     # namebench expects to be run from its own source tree (it uses relative
     # paths to various resources), make it work.
     postInstall = ''