diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 6d89246d1..0e843d555 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="3.4.2-2"
-export PIKA_PACKAGE_NAME="haskell-vector-instances"
+export PIKA_PACKAGE_VERSION="1.0.2.3-2"
+export PIKA_PACKAGE_NAME="haskell-microstache"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"