diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 95f4fe3ea..33d802c6d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.5.1.3-2"
-export PIKA_PACKAGE_NAME="haskell-generics-sop"
+export PIKA_PACKAGE_VERSION="0.3.6.3-13"
+export PIKA_PACKAGE_NAME="haskell-filemanip"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"