diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d2ff40f99..3de3f4b22 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.3.1-9"
-export PIKA_PACKAGE_NAME="ray"
+export PIKA_PACKAGE_VERSION="0.4.11b-4"
+export PIKA_PACKAGE_NAME="pythonpy"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"