^CMake Error at .*/Modules/ExternalProject.cmake:[0-9]+ \(message\): Target "SomeInterface" was not generated by ExternalProject_Add. Call Stack \(most recent call first\): Add_StepDependencies_iface.cmake:[0-9]+ \(ExternalProject_Add_StepDependencies\) CMakeLists.txt:[0-9]+ \(include\)$
