diff --git a/setup.py b/setup.py
index 8a0c12f2d2..52c241a0bb 100755
--- a/setup.py
+++ b/setup.py
@@ -176,7 +176,7 @@ def main():
               "bin/hummingbot.py",
               "bin/hummingbot_quickstart.py"
           ],
-          cmdclass={'build_ext': BuildExt},
+          cmdclass={'build_ext': BuildExt} if os.name != "nt" else {},
           )