diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 703c826d7..41a60699e 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.8.8+dfsg1-8"
-export PIKA_PACKAGE_NAME="python-ulmo"
+export PIKA_PACKAGE_VERSION="2.5.0-3"
+export PIKA_PACKAGE_NAME="ruby-fakefs"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"