diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 688863e71..53d4ad07d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.14.4.3+repack-1~exp3"
-export PIKA_PACKAGE_NAME="hdf5"
+export PIKA_PACKAGE_VERSION="1.5-1"
+export PIKA_PACKAGE_NAME="pymailgunner"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"