diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 9140438a6..6b5373d9d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.4.0-8"
-export PIKA_PACKAGE_NAME="guix"
+export PIKA_PACKAGE_VERSION="0.10.5-4"
+export PIKA_PACKAGE_NAME="rust-calloop-0.10"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"