diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index d3bbeb155..3cb1870e3 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.8.7-1"
-export PIKA_PACKAGE_NAME="rust-gix-date"
+export PIKA_PACKAGE_VERSION="4.2-5"
+export PIKA_PACKAGE_NAME="mdk4"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"