diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c77cf53dd..4d5bcc73c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.0.0-2"
-export PIKA_PACKAGE_NAME="ruby-packetfu"
+export PIKA_PACKAGE_VERSION="21.0.5~6ea-1"
+export PIKA_PACKAGE_NAME="openjdk-21"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"