diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index f8626309f..10d404067 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.10.1-1"
-export PIKA_PACKAGE_NAME="swiftlang"
+export PIKA_PACKAGE_VERSION="2.13.6-2"
+export PIKA_PACKAGE_NAME="pybind11"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"