diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 67b4d6ee8..5abae3f57 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="10.4.0-1"
-export PIKA_PACKAGE_NAME="more-itertools"
+export PIKA_PACKAGE_VERSION="0.4.6-1"
+export PIKA_PACKAGE_NAME="rust-num-bigint"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"