diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 6447ffed5..f7d55e7c6 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.7.2-4"
-export PIKA_PACKAGE_NAME="jupyter-core"
+export PIKA_PACKAGE_VERSION="5.0.1+dfsg-1"
+export PIKA_PACKAGE_NAME="stk"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"