TypeError: 'set' object is not subscriptable

[osemmler]

Hey,

please help...

When I try to run cppdep -c cppdep.yaml I get the following error:

Traceback (most recent call last):
  File "/data/home/osem/develop/planw/planw/boms/.venv/bin/cppdep", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/__main__.py", line 57, in main
    analysis = cppdep.DependencyAnalysis(args.config)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/cppdep.py", line 613, in __init__
    self.__parse_config(config_file)
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/cppdep.py", line 636, in __parse_config
    DependencyAnalysis.__add_package_group(pkg_group_config,
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/cppdep.py", line 661, in __add_package_group
    Package(pkg_config['name'],
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/cppdep.py", line 378, in __init__
    self.root = path_common(self.src_paths)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/home/osem/develop/planw/planw/boms/.venv/lib/python3.12/site-packages/cppdep/cppdep.py", line 92, in path_common
    path = os.path.commonprefix(paths)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen genericpath>", line 88, in commonprefix
TypeError: 'set' object is not subscriptable

Content of cppdep.yaml:

external:
  - name: Platform
    path: /
    packages:
      - name: Standard Libraries
        pattern: 
          - "[a-z_]+$"
          - ^std[a-z_]+.h$
          - string.h
          - math.h 
          - limits.h
  - name: Thirdparties
    path: /
    packages:
      - name: boost
        pattern:
          - boost\\      
    
internal:  # A list of package groups for analysis.
  - name: MyProject  # The name of a package-group.
    path: /data/project/  # The root path for the packages in the group.
    packages:  # A list of member packages, generated by CMake.

      - name: MyProject
        include:
            - .
        src:
              - /data/project/src/app/main.cpp

Any ideas what I'm doing wrong?

cppdep 0.2.4
Python 3.12.3