diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 1753f10eb..2a7e51b10 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.1.1-1"
-export PIKA_PACKAGE_NAME="ocaml-mirage-kv"
+export PIKA_PACKAGE_VERSION="2.16-1"
+export PIKA_PACKAGE_NAME="google-perftools"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"