Attempting to run the extension after locally building is failing: pandas is missing

[jcfr]

Steps to reproduce:

Here are the steps to reproduce:

$ extension_src_dir=/tmp/Slicer-ThicknessMap \
  extension_build_dir=/tmp/Slicer-ThicknessMap-build

$ git clone [email protected]:fatihtalu/Slicer-ThicknessMap.git ${extension_src_dir}

$ cmake \
  -DSlicer_DIR:PATH=$Slicer_R_DIR \
  -DCMAKE_BUILD_TYPE:STRING=Release \
  -S ${extension_src_dir} \
  -B ${extension_build_dir}

$ cmake --build ${extension_build_dir} --config Release

Then attempting to run reports the following error:

$ ${extension_build_dir}/SlicerWithThicknessMap 
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/jcfr/Projects/Slicer-Release/python-install/lib/python3.9/imp.py", line 169, in load_source
    module = _exec(spec, sys.modules[name])
  File "<frozen importlib._bootstrap>", line 613, in _exec
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/tmp/Slicer-ThicknessMap-build/lib/Slicer-5.3/qt-scripted-modules/ThicknessMap.py", line 6, in <module>
    import pandas as pd
ModuleNotFoundError: No module named 'pandas'
loadSourceAsModule - Failed to load file "/tmp/Slicer-ThicknessMap-build/lib/Slicer-5.3/qt-scripted-modules/ThicknessMap.py"  as module "ThicknessMap" !
Fail to instantiate module  "ThicknessMap"
The following modules failed to be instantiated:
   ThicknessMap
Switch to module:  "Welcome"

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