diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 5b47aed73..971a6c071 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4.0.48-1"
-export PIKA_PACKAGE_NAME="mtools"
+export PIKA_PACKAGE_VERSION="0.603-1"
+export PIKA_PACKAGE_NAME="libjson-schema-modern-perl"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"