#20205 `pex_binary` fails to locate `.so` files inside pex, `python_source` works Issue created by tgolsson Describe the bug Users using

pex_binary

together with

torch>=1.13

may encounter weird

_dl_open

errors in relation to CUDA libraries. The same lockfile, same code, works when using

python_source

instead. This indicates that there is some difference in how the pex and/or venv is built between these two cases that causes one to fail unexpectedly. The solution is simply to

import nvidia

before loading torch. For both

packed

and

loose

pex's this seems to cause all nvidia packages to install correctly, and work. This is a huge footgun, because transitive dependencies should be available no matter. I'm going to guess nothing actually imports these packages in

torch

either, as they contain no actual code... only `.so`s. Pants version 2.18 OS Can only occur on Linux. Additional info Runnable repro here: https://github.com/tgolsson/pants-repros/tree/main/torch-2 Slack thread here: https://pantsbuild.slack.com/archives/C046T6T9U/p1700184172636389 pantsbuild/pants