diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index dc365d595..686350ec5 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.12.7-1"
-export PIKA_PACKAGE_NAME="maildir-utils"
+export PIKA_PACKAGE_VERSION="0.0.1.2-1"
+export PIKA_PACKAGE_NAME="haskell-data-default-instances-old-locale"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"