diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 94530b427..b5511f51f 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2.0.0~alpha5+20240908-8"
-export PIKA_PACKAGE_NAME="rust-imap-codec"
+export PIKA_PACKAGE_VERSION="0.2.3.1-3"
+export PIKA_PACKAGE_NAME="haskell-dual-tree"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"