diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index cd5f99885..83bc432b5 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.7.0-1"
-export PIKA_PACKAGE_NAME="kf6-kdav"
+export PIKA_PACKAGE_VERSION="5.4.3-1"
+export PIKA_PACKAGE_NAME="python-exchangelib"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"