Epiphany does not build in Builder
Apparently epiphany has switched the build config to yaml. That means it does not work in Builder anymore (and therefore cannot be a candidate for the newcomers workflow).
Furthermore, switching to yaml before Builder even has a chance to get a release out the door to support yaml makes things impossible to support on my end.
I'd suggest switching it back to json until we can figure out a strategy to support yaml post-3.30.