As I mentioned above: Look in buildout.cfg for a section "eggs=". If there is anything just under this, add wicked - if not add wicked as first entry... According my example
eggs =
...
wicked
Afterwards run buildout. Maybe work also through the following topic regarding how to use buildout: it might give you some help as well:
-> Instead of the part with [version] for you in this situation its most probably the thing above with the eggs =...