diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 14658f9b2..98fb074d4 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="7.22.0+ds-2"
-export PIKA_PACKAGE_NAME="calibre"
+export PIKA_PACKAGE_VERSION="1.6.1-5"
+export PIKA_PACKAGE_NAME="tkcalendar"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"