Diamond protobuf dependency

[pjachowi]

Description

In my project I use rules_proto_grpc and independenty I use protobuf. When I run my project with bazel run I get the following error:

Traceback (most recent call last):
  File "/home/pjachowi/.cache/bazel/_bazel_pjachowi/837ec61bba9dc67ffa44001a7a1eb11f/execroot/_main/bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/_main/postumus/main/main_main.py", line 12, in <module>
    from proto import workflow_pb2_grpc
  File "/home/pjachowi/.cache/bazel/_bazel_pjachowi/837ec61bba9dc67ffa44001a7a1eb11f/execroot/_main/bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/_main/proto/workflow_py_proto_pb/proto/workflow_pb2_grpc.py", line 7, in <module>
    from proto import workflow_pb2 as proto_dot_workflow__pb2
  File "/home/pjachowi/.cache/bazel/_bazel_pjachowi/837ec61bba9dc67ffa44001a7a1eb11f/execroot/_main/bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/_main/proto/workflow_py_proto_pb/proto/workflow_pb2.py", line 9, in <module>
    from google.protobuf import runtime_version as _runtime_version
ImportError: cannot import name 'runtime_version' from 'google.protobuf' (bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/rules_python~~pip~pypi_311_protobuf/site-packages/google/protobuf/__init__.py)

The problem stems from the fact that rules_proto_grpc relies on its own protobuf containing runtime_version.py, but my project has implicite dependency on a different version of protobuf (4.25.5) which has no runtime_version.py.

In my sys.path the protobuf 4.25.5 comes first, then protobuf from rules_proto_grpc, hence from google.protobuf import runtime_version as _runtime_version finds first protobuf 4.25.5 and fails.

...
bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/rules_python~~pip~pypi_311_protobuf/site-packages
...
bazel-out/k8-fastbuild/bin/postumus/main/main.runfiles/rules_python~~pip~rules_proto_grpc_python_pip_deps_311_protobuf/site-packages

What is the recommended way to solve this problem?