I backed out the patch re-enabled before since we only need it on Linux (-> glibc?) but for some reason %ifarch-Tags doesn't seem to work as documented. Do I miss a thing?

bind8/bind8.spec

@@ -65,7 +65,12 @@ Conflicts:    bind
 %prep
     %setup0 -q -c -n bind8-%{version}
     %setup1 -q -T -D -a 1
+##  FIXME: surely we need the patch for Linux only but those do not work
+##         as documented in RPM-HOWTO. Any hints how to work around the
+##         situation without requireing external patch program?
+%ifarch linux2.2
     %patch0 -p0
+%endif
 
 %build
     PATH="%{l_prefix}/bin:$PATH"; export PATH