diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index ead6f940e..fbef3a974 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.0.7+git20250213.88b6683-1"
-export PIKA_PACKAGE_NAME="emacs-dart-mode"
+export PIKA_PACKAGE_VERSION="9.6.6-4"
+export PIKA_PACKAGE_NAME="ghc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"