diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index a7ab9b039..87ce2e6f6 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.8.2.1-1"
-export PIKA_PACKAGE_NAME="pyside6"
+export PIKA_PACKAGE_VERSION="3.22.3+dfsg1-1"
+export PIKA_PACKAGE_NAME="petsc"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b3"