GstreamerXzPackage (project  = 'gstreamer', name = 'gstreamer', version = '1.4.5', configure_flags = [
        '--disable-gtk-doc', 
        '--prefix="%{prefix}'
])

GstreamerXzPackage (project  = 'gstreamer', name = 'gstreamer', version = '1.4.5', configure_flags = [
        '--disable-gtk-doc', 
        '--prefix=%{prefix}'
])

Fix GStreamer packages use of prefix