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-rw-r--r--setuptools/command/build_ext.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/setuptools/command/build_ext.py b/setuptools/command/build_ext.py
index a4b9047e..c9ae4d7d 100644
--- a/setuptools/command/build_ext.py
+++ b/setuptools/command/build_ext.py
@@ -70,7 +70,7 @@ class build_ext(_build_ext):
self.write_stub(package_dir or os.curdir, ext, True)
- if _build_ext is not _du_build_ext:
+ if _build_ext is not _du_build_ext and not hasattr(_build_ext,'pyrex_sources'):
# Workaround for problems using some Pyrex versions w/SWIG and/or 2.4
def swig_sources(self, sources, *otherargs):
# first do any Pyrex processing