diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 47ced3268..486b759a4 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.2.0.1-7"
-export PIKA_PACKAGE_NAME="haskell-cereal-vector"
+export PIKA_PACKAGE_VERSION="6.3.0-2"
+export PIKA_PACKAGE_NAME="python-tooz"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"