Python run fails because the installation does not have required system dependencies

[kishaningithub]

Python 3.12 installed via pkgx does not work within docker. Python run fails with message

python: error while loading shared libraries: libpython3.12.so.1.0: cannot open shared object file: No such file or directory

Simulation steps

• Create a docker file named trial.Dockerfile with the following contents

FROM pkgxdev/pkgx

RUN pkgm install python@3.12

RUN python -c 'print("hello world")'

• Run command docker build -f trial.Dockerfile -t trial:latest .

Expected behaviour

Docker build must be successful and "hello world" must be printed

Actual behaviour

Errors out with message python: error while loading shared libraries: libpython3.12.so.1.0: cannot open shared object file: No such file or directory

Full log

[+] Building 1.2s (6/6) FINISHED                                                                                                               docker:colima
 => [internal] load build definition from trial.Dockerfile                                                                                              0.0s
 => => transferring dockerfile: 128B                                                                                                                    0.0s
 => [internal] load metadata for docker.io/pkgxdev/pkgx:latest                                                                                          0.9s
 => [internal] load .dockerignore                                                                                                                       0.0s
 => => transferring context: 2B                                                                                                                         0.0s
 => [1/3] FROM docker.io/pkgxdev/pkgx:latest@sha256:3cb64e57aede0ce66da3e5be729d7f72d46119a1583aa69e69b60e7d419d58b2                                    0.0s
 => CACHED [2/3] RUN pkgm install python@3.12                                                                                                           0.0s
 => ERROR [3/3] RUN python -c 'print("hello world")'                                                                                                    0.2s
------                                                                                                                                                       
 > [3/3] RUN python -c 'print("hello world")':
0.158 python: error while loading shared libraries: libpython3.12.so.1.0: cannot open shared object file: No such file or directory
------
trial.Dockerfile:5
--------------------
   3 |     RUN pkgm install python@3.12
   4 |     
   5 | >>> RUN python -c 'print("hello world")'
--------------------
ERROR: failed to build: failed to solve: process "/bin/sh -c python -c 'print(\"hello world\")'" did not complete successfully: exit code: 127

Possible fix

• I recommend using https://github.com/astral-sh/python-build-standalone or https://github.com/astral-sh/uv (which internally uses python-build-standalone) to install python without worrying about system dependency hell.

[jhheider]

This appears to be a pkgm issue:

FROM pkgxdev/pkgx

RUN pkgx python@3.12 -c 'print("hello world")'

works as expected. I'm going to move it to that repo.