Ok, the last problem (I HOPE!)…
It looks like vtk is trying to download during the build. This is not allowed for official builds.
-- Fetching "https://data.kitware.com/api/v1/file/hashsum/MD5/eaab2cdba68e8630f9a1f8a8e81cb097/download" -- Fetching "https://www.vtk.org/files/ExternalData/MD5/eaab2cdba68e8630f9a1f8a8e81cb097" CMake Error at /usr/share/cmake/Modules/ExternalData.cmake:1121 (message): Object MD5=eaab2cdba68e8630f9a1f8a8e81cb097 not found at: https://data.kitware.com/api/v1/file/hashsum/MD5/eaab2cdba68e8630f9a1f8a8e81cb097/download ("Couldn't resolve host name") https://www.vtk.org/files/ExternalData/MD5/eaab2cdba68e8630f9a1f8a8e81cb097 ("Couldn't resolve host name")
Is there a cmake option to prevent this?