diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 1864bc0f5..de6d74e56 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.9.0-1"
-export PIKA_PACKAGE_NAME="r-cran-ps"
+export PIKA_PACKAGE_VERSION="2.6.1-1"
+export PIKA_PACKAGE_NAME="r-cran-r6"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"