diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fdb232a40..f6183066c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.1-4"
-export PIKA_PACKAGE_NAME="haskell-smtlib"
+export PIKA_PACKAGE_VERSION="1.0.0-6"
+export PIKA_PACKAGE_NAME="haskell-time-units"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"