diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d696e386e..28903dbab 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.3.1-6"
-export PIKA_PACKAGE_NAME="rust-test-case"
+export PIKA_PACKAGE_VERSION="2.0.5-5"
+export PIKA_PACKAGE_NAME="ocaml-ptmap"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"