diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 02c2f0686..c99b4a224 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4.4.1-2"
-export PIKA_PACKAGE_NAME="r-base"
+export PIKA_PACKAGE_VERSION="0.20.10-1"
+export PIKA_PACKAGE_NAME="rust-darling-core"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"