diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fdfc7fb99..f4c879539 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="20250205.001-1"
-export PIKA_PACKAGE_NAME="libbusiness-isbn-data-perl"
+export PIKA_PACKAGE_VERSION="0.6.11-1"
+export PIKA_PACKAGE_NAME="castxml"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"