diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 79f1f3535..037ce0626 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.4.2-1"
-export PIKA_PACKAGE_NAME="python-xmlschema"
+export PIKA_PACKAGE_VERSION="2022-12-10+dfsg2-2"
+export PIKA_PACKAGE_NAME="lem"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"