diff --git a/jetty-alpn.spec b/jetty-alpn.spec
index 7029613..9d18fa0 100644
--- a/jetty-alpn.spec
+++ b/jetty-alpn.spec
@@ -37,8 +37,13 @@ BuildRequires:  mvn(org.eclipse.jetty.alpn:alpn-api)
 BuildRequires:  mvn(org.eclipse.jetty:jetty-io) >= %{version}
 BuildRequires:  mvn(org.eclipse.jetty:jetty-server) >= %{version}
 BuildArch:      noarch
+# missing gcc13 to build conscrypt's dependencies
+%if 0%{?sle_version} && 0%{?sle_version} < 150400
+ExclusiveArch:  do-not-build
+%endif
 
 %description
+
 %global desc \
 Jetty is a 100% Java HTTP Server and Servlet Container. This means that you\
 do not need to configure and run a separate web server (like Apache) in order\
@@ -58,13 +63,13 @@ This package contains
 Summary:        The alpn modules for Jetty (client components)
 
 %description client
-%extdesc %summary
+%{extdesc} %{summary}
 
 %package server
 Summary:        The alpn modules for Jetty (server components)
 
 %description server
-%extdesc %summary
+%{extdesc} %{summary}
 
 %package        javadoc
 Summary:        Javadoc for %{name}