diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index ce60eeeb3..dc167024c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.030-2"
-export PIKA_PACKAGE_NAME="verilator"
+export PIKA_PACKAGE_VERSION="5.1.1-3"
+export PIKA_PACKAGE_NAME="python-castellan"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"