diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index bc6e5a6b4..b1102b5db 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.1-2-1"
-export PIKA_PACKAGE_NAME="r-cran-gstat"
+export PIKA_PACKAGE_VERSION="0.61-4"
+export PIKA_PACKAGE_NAME="cl-ironclad"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"