diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index ed52f7a7c..c2730fcdf 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.2.0-2"
-export PIKA_PACKAGE_NAME="plasma5support"
+export PIKA_PACKAGE_VERSION="1.31.0-2"
+export PIKA_PACKAGE_NAME="php-symfony-polyfill"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"