diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 3a179cbc9..21d1cb68c 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="0.5.9-11"
-export PIKA_PACKAGE_NAME="haskell-mmap"
+export PIKA_PACKAGE_VERSION="0.2.0-3"
+export PIKA_PACKAGE_NAME="haskell-hex"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"