diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 1b07aa45f..d23e1dea5 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.9.1-1"
-export PIKA_PACKAGE_NAME="ppx-deriving-yojson"
+export PIKA_PACKAGE_VERSION="1.1.5-4"
+export PIKA_PACKAGE_NAME="php-fig-http-message-util"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"