diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 962d5a693..89abc46f9 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4.3.1-1"
-export PIKA_PACKAGE_NAME="python-zeep"
+export PIKA_PACKAGE_VERSION="1.6.0-3"
+export PIKA_PACKAGE_NAME="sphinx-a4doc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"