#18040 mypy runs see system packages Issue created by thejcannon Describe the bug Using

--python-executable=<value>

leads to mypy (somehow) seeing packages installed in the system

site-packages

. The run uses

--python-executable=./requirements_venv.pex_bin_python_shim.sh

. Running that shim and requesting

sys.path

does show that the global

site-packages

are NOT part of the

sys,path

(thanks to PEX stripping them). So mypy must be assuming them based on some other info. This was found because our sandbox uses a package of a version without type annotations, but on some dev boxes

mypy

will complain about incompatible types. This is only on dev boxes where user has an install of that package that is newer (and contains type hints). Pants version 2.14+ OS N/A Additional info N/A pantsbuild/pants