diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index c4aedb82c..028fa18dc 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.4.1+ds-1"
-export PIKA_PACKAGE_NAME="parallel-hashmap"
+export PIKA_PACKAGE_VERSION="0.6.1.2-5"
+export PIKA_PACKAGE_NAME="ruby-narray"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"