diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 2b9cfde73..985482ccf 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2:18.7.0-2"
-export PIKA_PACKAGE_NAME="python-novaclient"
+export PIKA_PACKAGE_VERSION="7.1.1+dfsg1-1exp2"
+export PIKA_PACKAGE_NAME="sundials"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"