diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c7f452f98..08d737118 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.3.3-2"
-export PIKA_PACKAGE_NAME="rust-rfc822-sanitizer"
+export PIKA_PACKAGE_VERSION="1.0.171-1"
+export PIKA_PACKAGE_NAME="rust-serde-test"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"