diff --git a/mesonbuild/modules/python.py b/mesonbuild/modules/python.py index 57cea91b5e77..0037e2d984dc 100644 --- a/mesonbuild/modules/python.py +++ b/mesonbuild/modules/python.py @@ -280,7 +280,18 @@ def set_env(name, value): import json import sys -install_paths = sysconfig.get_paths(vars={'base': '', 'platbase': '', 'installed_base': ''}) +# On Debian derivatives, the Python interpreter shipped by the distribution uses +# a custom install scheme, deb_system, for the system install, and changes the +# default scheme to a custom one pointing to /usr/local and replacing +# site-packages with dist-packages. +# See https://github.com/mesonbuild/meson/issues/8739. +empty_vars = {'base': '', 'platbase': '', 'installed_base': ''} +if 'deb_system' in sysconfig.get_scheme_names(): + paths = sysconfig.get_paths('deb_system') + install_paths = sysconfig.get_paths('deb_system', vars=empty_vars) +else: + paths = sysconfig.get_paths() + install_paths = sysconfig.get_paths(vars=empty_vars) def links_against_libpython(): from distutils.core import Distribution, Extension @@ -290,7 +301,7 @@ def links_against_libpython(): print(json.dumps({ 'variables': sysconfig.get_config_vars(), - 'paths': sysconfig.get_paths(), + 'paths': paths, 'install_paths': install_paths, 'sys_paths': sys.path, 'version': sysconfig.get_python_version(), @@ -373,14 +384,9 @@ def _get_path(self, key: str) -> None: sys_paths = self.info['sys_paths'] rel_path = self.info['install_paths'][key][1:] if not any(p.endswith(rel_path) for p in sys_paths if not p.startswith(user_dir)): - # On Debian derivatives sysconfig install path is broken and is not - # included in the locations python actually lookup. - # See https://github.com/mesonbuild/meson/issues/8739. mlog.warning('Broken python installation detected. Python files', 'installed by Meson might not be found by python interpreter.', once=True) - if mesonlib.is_debianlike(): - rel_path = 'lib/python3/dist-packages' return rel_path