diff --git a/etc/rebuild-cython.sh b/etc/rebuild-cython.sh
new file mode 100755
index 00000000..3cc531a3
--- /dev/null
+++ b/etc/rebuild-cython.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+find zipline tests -name "*.so" | xargs rm || true
+python setup.py build_ext --inplace