VTK-m correctly handles have find_package called multiple times.

When you called find_package multiple times with VTK-m components such
as CUDA would continuously append to variables, causing a variable to have
the same parameter listed multiple times. Secondly since the VTKmConfig
would clear the FOUND flags, each call would cause VTK-m to search for
sections all over again.

The primary issue that caused this correction was passing the same
compile flags multiple times to nvcc which causes compile errors.
1 job for correct_multiple_find_packages_vtkm