diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 5a1e544b6..0c62d61a6 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.1.0.0-11"
-export PIKA_PACKAGE_NAME="haskell-oo-prototypes"
+export PIKA_PACKAGE_VERSION="0.0.1.0-5"
+export PIKA_PACKAGE_NAME="haskell-th-constraint-compat"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"