diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 0c49a564a..dbd9ad036 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4.0.0-8"
-export PIKA_PACKAGE_NAME="mpi4py"
+export PIKA_PACKAGE_VERSION="2.4.2+dfsg1-1"
+export PIKA_PACKAGE_NAME="binwalk"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"