diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 1d38b43ff..e976a1a55 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.4.0-1"
-export PIKA_PACKAGE_NAME="libcangjie"
+export PIKA_PACKAGE_VERSION="0.4.7-4"
+export PIKA_PACKAGE_NAME="haskell-hierarchical-clustering"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"