diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 6a5f1a3e0..be82c9c55 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.1.3-2"
-export PIKA_PACKAGE_NAME="python-sse-starlette"
+export PIKA_PACKAGE_VERSION="1.41-2"
+export PIKA_PACKAGE_NAME="serpent"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"