PythonCall pip dependency not building correctly

I have a python package, which I can pip install. I am trying to wrap it using PythonCall. My python package has a pyproject.toml file and it has scipy as one of its dependencies. The latest scipy seems to need a version of GLIBCXX_3.4.30, but the add or using statements do not seem to bring in the required CXX dependencies for scipy. Is there something I am missing? Do I need a special build script?

My CondaPkg.toml file in the Julia package looks like this

hello_python = "@ <url to repo>/_git/HelloPython"

My pyproject.toml looks like

requires = [
build-backend = "setuptools.build_meta"

name = "hello_python"
version = "0.0.1"
description = "A small example package"
classifiers = [
    "Programming Language :: Python :: 3"

dependencies = [

GLIBC is usually provided by your system and not Julia or Python. You can check yours on a terminal with ldd --version