diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fa8a8ba30..58adf150f 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.1.0.4-1"
-export PIKA_PACKAGE_NAME="haskell-old-time"
+export PIKA_PACKAGE_VERSION="1.2.0-3"
+export PIKA_PACKAGE_NAME="haskell-mmorph"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"