setup.py code to run on `pip install` but not on `python -m build`

I have some code in a setup.py file that checks for a third-party SDK that must be manually installed before the application is installed:

import sys
from setuptools import setup

# ---- BEGIN SDK CHECK

try:
    import pyzed.sl
except ImportError:
    print("ERROR: You must manually install the ZED Python SDK first.")
    sys.exit(1)

zed_version = [int(p) for p in pyzed.sl.Camera.get_sdk_version().split(".")]
if zed_version < [4,0,8]:
    print("ERROR: ZED SDK 4.0.8 or higher is required, you must update the ZED SDK first.")
    sys.exit(1)

# ---- END SDK CHECK

setup(...)

However, I only want this code to execute when the package is installed, not when the package source tarball / wheel is built. That is:

• I want it to execute when pip install ... is run.
• I do not want it to execute when python -m build -x ... is run.

Is there some way to accomplish this? E.g. is there a way to determine if setup.py was invoked via pip install but not via python -m build? Or is there some other way to only run checks on install?