diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0de5f96ba..af0cbf238 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.9.1-2"
-export PIKA_PACKAGE_NAME="pydantic"
+export PIKA_PACKAGE_VERSION="0.1.19-2"
+export PIKA_PACKAGE_NAME="python-hdf5storage"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"