diff --git a/setup.py b/setup.py
index 202b2b1..f682005 100644
--- a/setup.py
+++ b/setup.py
@@ -115,7 +115,6 @@ def run(self):
         include_dirs=[numpy.get_include()],
         language="c++",
     ),
-    dp_build.ffibuilder.distutils_extension(),
 ]