diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index e3f40d430..79e57d1c1 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.12.11-3"
-export PIKA_PACKAGE_NAME="haskell-parsers"
+export PIKA_PACKAGE_VERSION="1.1.5.0-4"
+export PIKA_PACKAGE_NAME="haskell-bitvec"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"