diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 9a57b02f5..aec67dcc0 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.19.1-3"
-export PIKA_PACKAGE_NAME="backblaze-b2"
+export PIKA_PACKAGE_VERSION="2.4b-4"
+export PIKA_PACKAGE_NAME="emacs-session"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"