I've just checked this and it seems to work ok to me. This is what your 0.17.7 spaceflights starter project should look like: https://github.com/AntonyMilneQB/test/tree/spaceflights/spaceflights. It contains the two namespaced catalog entries in catalog.yml: https://github.com/AntonyMilneQB/test/blob/spaceflights/spaceflights/conf/base/catalog.yml#L76-L86