diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c435800f8..c8f5e53a8 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.0.4+dfsg-1"
-export PIKA_PACKAGE_NAME="ruby-marcel"
+export PIKA_PACKAGE_VERSION="0.2.23-1"
+export PIKA_PACKAGE_NAME="r-cran-rjson"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"