diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 735e6a1ee..38a837f74 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.1a-12"
-export PIKA_PACKAGE_NAME="ocaml-reins"
+export PIKA_PACKAGE_VERSION="6.5-1"
+export PIKA_PACKAGE_NAME="zope.testrunner"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"