httpd: setuptools is not top-level

nixos/modules/services/web-servers/apache-httpd/trac.nix

···
         makeSearchPathOutput "lib" "lib/${pkgs.python.libPrefix}/site-packages"
           [ pkgs.mod_python
             pkgs.pythonPackages.trac
-            pkgs.setuptools
+            pkgs.pythonPackages.setuptools
             pkgs.pythonPackages.genshi
             pkgs.pythonPackages.psycopg2
             subversion