diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fcee6dd29..fa5521203 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.19.7+dfsg-1"
-export PIKA_PACKAGE_NAME="doctrine"
+export PIKA_PACKAGE_VERSION="0.6.1-1"
+export PIKA_PACKAGE_NAME="rust-iso8601"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"