"Invoke Phing targets" is available from the build actions for a Jenkins job, but not as a "Promote builds when..." action for the promoted-builds plugin. Other actions, like "Execute shell", "Invoke Ant" and "Invoke top-level Maven targets" are available but I'd like to run Phing directly.

The promoted-builds plugin wants PhingDescriptor to be an instance of hudson.tasks.BuildStepDescriptor hudson.model.Descriptor<hudson.tasks.Builder> and checks if BuildStepDescriptor.isApplicable() returns true.