diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index f758625d3..05d4145c0 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.3.4.2-2"
-export PIKA_PACKAGE_NAME="ruby-whitequark-parser"
+export PIKA_PACKAGE_VERSION="3.1-3"
+export PIKA_PACKAGE_NAME="django-polymorphic"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"