diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 4af44b3d1..195e92760 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="27"
-export PIKA_PACKAGE_NAME="libstdc++-arm-none-eabi"
+export PIKA_PACKAGE_VERSION="5.3~rc16+dfsg-11"
+export PIKA_PACKAGE_NAME="tree-puzzle"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"