old_contents: GnuXzPackage ('clutter', '1.10.6',
  	sources = [ 'http://source.clutter-project.org/sources/clutter/1.10/%{name}-%{version}.tar.xz' ],
  )
  
new_contents: GnomeXzPackage ('clutter', version_major = '1.22', version_minor = '0')
  
subject: Update Clutter to 1.22.0