diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 52ef14257..645ef41bd 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.3.3+dfsg-1"
-export PIKA_PACKAGE_NAME="bootstrap-html"
+export PIKA_PACKAGE_VERSION="0.3-4"
+export PIKA_PACKAGE_NAME="elpa-darkroom"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"