pip install not working when using python-dbg

I am interested in installing vtk using python-dbg, but I get this error:

miguelito@miguelito:~$ virtualenv --python=/usr/bin/python3-dbg testvtk
miguelito@miguelito:~$ source testvtk/bin/activate
(testvtk) miguelito@miguelito:~$ pip3 install vtk
ERROR: Could not find a version that satisfies the requirement vtk (from versions: none)
ERROR: No matching distribution found for vtk

I can install other packages with no problems and can install vtk inside of a virtualenv with no problems either.

AFAIK, we do not provide wheels which work with a debug Python.

In that case, how does the VTK team go about debugging the python interface? I understand that the python interface calls the C++ VTK library

Build VTK with CMAKE_BUILD_TYPE=RelWithDebInfo and you get the .pdb files, then can debug using the release cpython executable.