diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0f6f81569..57f7de7d7 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="24~8ea-1"
-export PIKA_PACKAGE_NAME="openjdk-24"
+export PIKA_PACKAGE_VERSION="1.3.2+git20240429.124f234-2"
+export PIKA_PACKAGE_NAME="r-cran-irkernel"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"