diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index b2c63a450..9a5beb319 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="13.3.0-1"
-export PIKA_PACKAGE_NAME="gcc-13-doc"
+export PIKA_PACKAGE_VERSION="2.23.3-1"
+export PIKA_PACKAGE_NAME="pydantic-core"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"