diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 802a4e2fe..44a62890e 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="7.1.1-2"
-export PIKA_PACKAGE_NAME="python-flake8"
+export PIKA_PACKAGE_VERSION="0.49+dfsg-1"
+export PIKA_PACKAGE_NAME="r-cran-xfun"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"