diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d77bed509..c7b65f05c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.1.5-2"
-export PIKA_PACKAGE_NAME="astropy"
+export PIKA_PACKAGE_VERSION="1.4.21-1"
+export PIKA_PACKAGE_NAME="libxstream-java"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"