blob: 38e2c8c8406d2e787bc7f5f72eac6ad90b660288 (
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diff --git a/colcon_python_setup_py/package_identification/python_setup_py.py b/colcon_python_setup_py/package_identification/python_setup_py.py
index 9037e84..7a513a0 100644
--- a/colcon_python_setup_py/package_identification/python_setup_py.py
+++ b/colcon_python_setup_py/package_identification/python_setup_py.py
@@ -248,7 +248,14 @@ def _get_setup_information(setup_py, *, env=None):
'import sys',
# setuptools needs to be imported before distutils
# to avoid warning introduced in setuptools 49.2.0
- 'from setuptools.extern.packaging.specifiers import SpecifierSet',
+ 'from contextlib import suppress',
+ 'exec("with suppress(ImportError):'
+ ' from setuptools.extern.packaging.specifiers'
+ ' import SpecifierSet")',
+ # newer versions expose 'packaging' directly
+ # on Arch 'extern' isn't part of the package
+ 'exec("with suppress(ImportError):'
+ ' from packaging.specifiers import SpecifierSet")',
'from distutils.core import run_setup',
'dist = run_setup(
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