diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 8ae3a7e29..f5e047c66 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="14.1"
-export PIKA_PACKAGE_NAME="gnat"
+export PIKA_PACKAGE_VERSION="0.1.11-2"
+export PIKA_PACKAGE_NAME="libestr"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"