diff --git a/ci/build_examples.sh b/ci/build_examples.sh
index 2de91e4..424b153 100755
--- a/ci/build_examples.sh
+++ b/ci/build_examples.sh
@@ -16,6 +16,7 @@ for i in $examples; do
         make defconfig
         make -j 4
     else
+        rm -rf build
         idf.py build
     fi;
 done