diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 1df1cab8a..24478eb29 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.32.4-1"
-export PIKA_PACKAGE_NAME="serd"
+export PIKA_PACKAGE_VERSION="3.4-5"
+export PIKA_PACKAGE_NAME="python-vdf"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"