diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 84b2f2936..5df636064 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.1+dfsg1-1"
-export PIKA_PACKAGE_NAME="pympler"
+export PIKA_PACKAGE_VERSION="0.3.7-3"
+export PIKA_PACKAGE_NAME="ruby-rblineprof"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"