diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 583ba3f0a..fd1de6672 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.0.2-7"
-export PIKA_PACKAGE_NAME="haskell-monadlist"
+export PIKA_PACKAGE_VERSION="1.0.0.7-12"
+export PIKA_PACKAGE_NAME="haskell-old-locale"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"