diff --git a/.gitea/build.sh b/.gitea/build.sh
index d2995b1..cb7b811 100755
--- a/.gitea/build.sh
+++ b/.gitea/build.sh
@@ -4,6 +4,9 @@ log () {
   echo "=== $*"
 }
 
+# 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/
@@ -20,6 +23,9 @@ while read vid pid variant; do
   " build/arduino/hardware/arduino/avr/boards.txt
   grep 'leonardo.build' build/arduino/hardware/arduino/avr/boards.txt
 
+  # I told you not to use this directory, Arduino.
+  rm -rf $HOME/.cache
+
   arduino-builder \
     -fqbn arduino:avr:leonardo \
     -build-path $(pwd)/build/ \