[Fedora-packaging] disttag doesn't work

hello, I'm building packages and I want to use disttag as referred at this page. https://fedoraproject.org/wiki/Packaging:DistTag as a result the package is named as is packagename-1.0.0-1.noarch.rpm instead of packagename-1.0.0-1el5.noarch.rpm here the head of my specfile. Name: packagename Version: 1.0.0 Release: 1%{?dist} Summary: some text Group: application License: Propriatory URL: http://somewhere.domain.com Source0: %{name}-%{version}.tar.gz BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n) BuildArch: noarch Conflicts: libgcj %description more text in these area %package binary Summary: packagename binary and library Group: System %if 0%{?rhel} >= 4 || 0%{?rhel} Requires: jre else Requires: java-1.6.0-openjdk Obsoletes: jre %endif Obsoletes: packagename-stack ...... ...... ...... ...... What I do wrong? Thanks for your help