stack.sh fails during networking-sfc plugin installation

Hi,

When following the Wiki instructions I get a failure during the devstack deployment:

(...)
2016-11-08 02:19:43.262 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1158 local service_plugin_class=networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin
2016-11-08 02:19:43.271 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1159 [[ '' == '' ]]
2016-11-08 02:19:43.280 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1160 Q_SERVICE_PLUGIN_CLASSES=networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin
2016-11-08 02:19:43.289 | ++/opt/stack/networking-sfc/devstack/plugin.sh:networking_sfc_configure_common:10 _neutron_service_plugin_class_add networking_sfc.services.sfc.plugin.SfcPlugin
2016-11-08 02:19:43.298 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1158 local service_plugin_class=networking_sfc.services.sfc.plugin.SfcPlugin
2016-11-08 02:19:43.308 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1159 [[ networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin == '' ]]
2016-11-08 02:19:43.317 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1161 [[ ! ,networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin, =~ ,networking_sfc.services.sfc.plugin.SfcPlugin, ]]
2016-11-08 02:19:43.326 | ++lib/neutron-legacy:_neutron_service_plugin_class_add:1162 Q_SERVICE_PLUGIN_CLASSES=networking_sfc.services.flowclassifier.plugin.FlowClassifierPlugin,networking_sfc.services.sfc.plugin.SfcPlugin
2016-11-08 02:19:43.335 | ++/opt/stack/networking-sfc/devstack/plugin.sh:networking_sfc_configure_common:11 iniset / agent extensions sfc
2016-11-08 02:19:43.380 | tee: /: Is a directory
2016-11-08 02:19:43.382 | Error on exit

This seems like the following line fails to find the variable undefined:

    iniset /$Q_PLUGIN_CONF_FILE agent extensions "sfc"

May this be a bug or I am doing something wrong?

Thanks in advance and best regards,

Pau