diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fb0c17373..4299fff44 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.13.0.0-1"
-export PIKA_PACKAGE_NAME="haskell-arithmoi"
+export PIKA_PACKAGE_VERSION="0.29.0-2"
+export PIKA_PACKAGE_NAME="rust-shadow-rs"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"