`pip install ogs` fails on arm-based MacOS for v6.5.7 and v6.5.8

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We cannot install OGS using pip install ogs on arm-based MacOS computers.

The error is due to an unset CPM_SOURCE_CACHE variable.

Please see the error message below:

CMake Error at scripts/cmake/Dependencies.cmake:196 (message): 

CPM_SOURCE_CACHE not set but is required when patched third-party libraries are use, see


Call Stack (most recent call first):
CMakeLists.txt:102 (include)

  -- Configuring incomplete, errors occurred!

  *** CMake configuration failed
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for ogs