diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 7d13061ae..f2d0f66de 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="6.5.2-1"
-export PIKA_PACKAGE_NAME="importlib-resources"
+export PIKA_PACKAGE_VERSION="20241021-1"
+export PIKA_PACKAGE_NAME="python-diff-match-patch"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"