diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 83cf57636..9aac76ae0 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.5.0-1"
-export PIKA_PACKAGE_NAME="kf6-kitemmodels"
+export PIKA_PACKAGE_VERSION="5.0~git20230712.81e08ee+dfsg-2"
+export PIKA_PACKAGE_NAME="qtsystems-opensource-src"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"