diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 15a8befc0..7b16cd609 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.1.1.7-2"
-export PIKA_PACKAGE_NAME="haskell-filelock"
+export PIKA_PACKAGE_VERSION="0.4.3-4"
+export PIKA_PACKAGE_NAME="haskell-dotgen"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"