diff --git a/hdf5.changes b/hdf5.changes
index 25c7b2a..9f22b15 100644
--- a/hdf5.changes
+++ b/hdf5.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Oct 17 14:07:15 UTC 2017 - eich@suse.com
+
+- Add magic to limit the number of flavors built in the
+  in the OBS ring.
+
 -------------------------------------------------------------------
 Fri Sep  8 14:35:32 UTC 2017 - eich@suse.com
 
diff --git a/hdf5.spec b/hdf5.spec
index aacb421..6b25b72 100644
--- a/hdf5.spec
+++ b/hdf5.spec
@@ -28,11 +28,21 @@
 %define src_ver %{version}-patch1
 %define pname hdf5
 
+%bcond_with ringdisabled
+
 %if "%{flavor}" == ""
 ExclusiveArch:  do_not_build
  %define package_name %pname
 %endif
 
+# Magic for OBS Staging. Only build the flavors required by
+# other packages in the ring.
+%if %{with ringdisabled}
+ %if "%flavor" != "standard"
+ExclusiveArch:  do_not_build
+ %endif
+%endif
+
 %if "%{flavor}" == "serial"
 %undefine suffix
 %undefine mpi_flavor