diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 962a930bf..dfb424380 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.7-3"
-export PIKA_PACKAGE_NAME="espresso"
+export PIKA_PACKAGE_VERSION="5.1-2"
+export PIKA_PACKAGE_NAME="zope.exceptions"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"