diff --git a/.gitea/build.sh b/.gitea/build.sh
index 8db2925..681def0 100755
--- a/.gitea/build.sh
+++ b/.gitea/build.sh
@@ -9,15 +9,18 @@ log () {
 # Make sure we're in the project directory
 cd $(dirname $0)/..
 
-## This is bananas.
-mkdir -p build/ out/ build/cache/
-cp -rL /usr/share/arduino /usr/share/arduino-builder build/ || true # there's a cyclic symlink that causes failure
+mkdir -p out/
 
 while read vid pid variant; do
   log
   log Building $vid $pid $product
   log
 
+  ## This is bananas.
+  rm -rf build/
+  mkdir -p build/cache/
+  cp -rL /usr/share/arduino /usr/share/arduino-builder build/ || true # there's a cyclic symlink that causes failure
+
   sed -i "
     /leonardo.build.vid/ s/=.*/=$vid/
     /leonardo.build.pid/ s/=.*/=$pid/