diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0c62d61a6..ad58abc96 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.0.1.0-5"
-export PIKA_PACKAGE_NAME="haskell-th-constraint-compat"
+export PIKA_PACKAGE_VERSION="0.5.1-4"
+export PIKA_PACKAGE_NAME="haskell-unexceptionalio"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"