diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index e99bffe00..334d046fd 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="9.0.2.4-12"
-export PIKA_PACKAGE_NAME="haskell-hxt-unicode"
+export PIKA_PACKAGE_VERSION="2.1.0-1"
+export PIKA_PACKAGE_NAME="rust-zvariant-utils"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"