diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 3697bbf53..327b94474 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.4.2-8"
-export PIKA_PACKAGE_NAME="fife"
+export PIKA_PACKAGE_VERSION="1.81.0+dfsg1-1~exp1"
+export PIKA_PACKAGE_NAME="rustc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"