diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index a24e56c9a..add611ca8 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.1-3-1"
-export PIKA_PACKAGE_NAME="r-cran-segmented"
+export PIKA_PACKAGE_VERSION="6.11um1"
+export PIKA_PACKAGE_NAME="user-mode-linux"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"