diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 3b09761d9..1f69fda0a 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1.12.0-1"
-export PIKA_PACKAGE_NAME="pystac"
+export PIKA_PACKAGE_VERSION="5.15.16-3.1"
+export PIKA_PACKAGE_NAME="pyside2"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"