diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 361097572..979b70eed 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.7.18-1"
-export PIKA_PACKAGE_NAME="mdformat"
+export PIKA_PACKAGE_VERSION="0.2.1.4-2"
+export PIKA_PACKAGE_NAME="haskell-hsyaml"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"