diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 40ca268a8..bd760695d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="17.0.12+7-2"
-export PIKA_PACKAGE_NAME="openjdk-17"
+export PIKA_PACKAGE_VERSION="0.8.1-3"
+export PIKA_PACKAGE_NAME="elpa-undo-tree"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"