#19514 Wrong Python version in a docker container running pex Issue created by mdelmans Describe the bug

$ pants run src/py/docker_test:main

/usr/bin/env: ‘python3.9’: No such file or directory

Pants version 2.16 OS Mac OS 13.4 Intel Additional info

# src/py/docker_test/main.py

if __name__ == "__main__":
    print('Hello world!')

# src/py/docker_test/BUILD

python_sources()

pex_binary(
    name="main",
    entry_point="main.py",
    platforms=[
        "linux-x86_64-cp-310-cp310m",
        "macosx_10.12_x86_64-cp-310-cp310"
    ]
)

docker_image(
    name="docker"
)

# src/py/docker_test/Dockerfile

FROM python:3.10-slim
ENTRYPOINT ["/bin/main"]
COPY src.py.docker_test/main.pex /bin/main

# pants.toml

[python]
interpreter_constraints = ["CPython==3.10.*"]

If I remove

platforms

from the

pex_binary

everything works fine. pantsbuild/pants