build error after ninja clean

[PhilipDeegan]

possibly a kokkos build issue rather than tutorial related, but it's reproducible from here

cd Exercises/04/Begin # arbitrary
mkdir build
cd build
cmake .. -G Ninja
ninja
ninja clean
ninja #fail

error message

ninja  
[4/30] Building CXX object Kokkos/CMakeFiles/impl_git_version.dir/__/generated/Kokkos_Version_Info.cpp.o
FAILED: Kokkos/CMakeFiles/impl_git_version.dir/__/generated/Kokkos_Version_Info.cpp.o 
/usr/bin/c++  -I/io/koks/Exercises/04/Begin/build/generated -O2 -g -DNDEBUG -MD -MT Kokkos/CMakeFiles/impl_git_version.dir/__/generated/Kokkos_Version_Info.cpp.o -MF Kokkos/CMakeFiles/impl_git_version.dir/__/generated/Kokkos_Version_Info.cpp.o.d -o Kokkos/CMakeFiles/impl_git_version.dir/__/generated/Kokkos_Version_Info.cpp.o -c /io/koks/Exercises/04/Begin/build/generated/Kokkos_Version_Info.cpp
cc1plus: fatal error: /io/koks/Exercises/04/Begin/build/generated/Kokkos_Version_Info.cpp: No such file or directory
compilation terminated.

[cedricchevalier19]

I can reproduce it, thanks for reporting.