Custom Assembler in Dolfinx

Hello all, for my application I need to directly assemble a certain stiffness matrix and I was hoping to go off of an example in the dolfinx repo. I am trying to reproduce the unit test in python/test/unit/fem/test_custom_assembler.py as a starting point. One of the functions in the python script requires the following:

from dolfinx.jit import dolfinx_pc

however, when using the conda install of dolfinx I am not able to locate this module. In the body of the code it looks like this specific module is only used once:

          os.path.join(petsc_dir, 'include')] + dolfinx_pc["include_dirs"],

Is there a way to access this dolfinx_pc["include_dirs"] using just the basic conda installation?

Thanks!