diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 68b16e487..005f13693 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="4:24.08.0-4"
-export PIKA_PACKAGE_NAME="dolphin"
+export PIKA_PACKAGE_VERSION="5.40.0-6"
+export PIKA_PACKAGE_NAME="perl"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"