ki18n seems to lacks a *DEPEND on qtdeclarative:5 as the cmake settings wants qt5qml-config.cmake / Qt5QmlConfig.cmake.
Well I can confirm, ki18n configures and compiles successfully after I merged qtdeclarative:5.
Please attach the build log. I suspect this is only required for tests.
Thanks, fixed in commit bb1d4f5039b5c69ebcf56379597dc8b35361b7b1