diff --git a/travis.sh b/travis.sh
index eed6a96f2..78599665c 100755
--- a/travis.sh
+++ b/travis.sh
@@ -17,6 +17,7 @@ fi
 
 if [ "${VIA}" == "compile" ]; then
   pip install -r requirements.txt
+  python setup.py clean --all
   python setup.py build_ext --inplace
   pip install -e .
 fi