diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fc237d63d..8a9e26452 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.11.2+ds1-2"
-export PIKA_PACKAGE_NAME="python-blosc"
+export PIKA_PACKAGE_VERSION="1.1.3-1"
+export PIKA_PACKAGE_NAME="synthv1"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"