diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c96660cb1..cf7ec6c8c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.1.0-2"
-export PIKA_PACKAGE_NAME="python-iso8601"
+export PIKA_PACKAGE_VERSION="2.11.9-1"
+export PIKA_PACKAGE_NAME="haskell-hspec-core"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"