The current Build design allows for a relatively straightforward extension to use S2I as a BuildTemplate. You can see other examples here: https://github.com/kn

The current Build design allows for a relatively straightforward extension to use S2I as a BuildTemplate. You can see other examples here: https://github.com/knative/build-templates https://github.com/knative/build-templates As and when Builds becomes Pipelines, I anticipate that it will remain relatively trivial to integrate existing build infrastructure without too much fuss.