diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 6f924e5f0..f2d2ba91d 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.18.6-1"
-export PIKA_PACKAGE_NAME="python-msgspec"
+export PIKA_PACKAGE_VERSION="0.4-4"
+export PIKA_PACKAGE_NAME="eshell-z"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"