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-rw-r--r--setuptools/build_meta.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/setuptools/build_meta.py b/setuptools/build_meta.py
index 1fb4c3b1..618a5e8f 100644
--- a/setuptools/build_meta.py
+++ b/setuptools/build_meta.py
@@ -326,7 +326,7 @@ class _BuildMetaBackend(_ConfigSettingsTranslator):
def run_setup(self, setup_script='setup.py'):
# Note that we can reuse our build directory between calls
# Correctness comes first, then optimization later
- __file__ = setup_script
+ __file__ = os.path.abspath(setup_script)
__name__ = '__main__'
with _open_setup_script(__file__) as f: