diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 50f098188..633da695c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.2.0-3"
-export PIKA_PACKAGE_NAME="haskell-language-c99-util"
+export PIKA_PACKAGE_VERSION="1.0.0-6"
+export PIKA_PACKAGE_NAME="haskell-xml-helpers"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"