diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 5464a2c94..1860bb721 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="20231118.git07e7ff5-1"
-export PIKA_PACKAGE_NAME="cl-unicode"
+export PIKA_PACKAGE_VERSION="4.6.1-2"
+export PIKA_PACKAGE_NAME="python-dendropy"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"