diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index f307bf4de..a1407183f 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.3.6.6-13"
-export PIKA_PACKAGE_NAME="haskell-stringsearch"
+export PIKA_PACKAGE_VERSION="0.4.13.1-2"
+export PIKA_PACKAGE_NAME="haskell-microlens"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"