diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 49f76fc6d..fd2ec10eb 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.3.1.2-1"
-export PIKA_PACKAGE_NAME="haskell-lambdabot-social-plugins"
+export PIKA_PACKAGE_VERSION="1.8.1-3"
+export PIKA_PACKAGE_NAME="rust-clang-sys"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"