title: RPM spec to require specific RHEL release
body: <p>In an RPM spec file, what is a good way of requiring a minimum RHEL distribuition? I tried to make RHEL 6.3 a prerequisite using:</p>
  
  <pre><code>Requires: redhat-release-server-6Server &gt;= 6.3
  </code></pre>
  
  <p>This blocks the install on 6.2 and 6.3 with:</p>
  
  <pre><code>error: Failed dependencies:
      redhat-release-server-6Server &gt;= 6.3 is needed by my.package-1.2.0-0.x86_64
  </code></pre>
  
  <p>I also tried:</p>
  
  <pre><code>Requires: redhat-release &gt;= 6.3
  </code></pre>
  
  <p>which did not fail the dependecy check on either 6.2 or 6.3.</p>