diff --git a/web/build.sh b/web/build.sh
index 252bf943..b59babe4 100644
--- a/web/build.sh
+++ b/web/build.sh
@@ -5,6 +5,7 @@ pwd
 
 while IFS= read -r theme; do
     echo "Building theme: $theme"
+    rm -r build/$theme
     cd "$theme"
     npm install
     DISABLE_ESLINT_PLUGIN='true' REACT_APP_VERSION=$version npm run build