Replacing the default "make" step of QtCreator with a "xcodebuild" is not possible. QtCreator complains about a missing make step.

11:31:19: Could not determine which "make" command to run. Check the "make" step in the build configuration.
Error while building/deploying project library (kit: Qt 5.10.1 for iOS)
When executing step "qmake"

Am I missing how to use the "xcodebuild" step?

When using cocoapods, building using xcodebuild instead of make is required since it inserts additional dependencies into the workspace.