diff --git a/checks/backups/flake-module.nix b/checks/backups/flake-module.nix
index ffca8e4c4..46a8f48ee 100644
--- a/checks/backups/flake-module.nix
+++ b/checks/backups/flake-module.nix
@@ -157,6 +157,7 @@
           "lib/flake-module.nix"
           "lib/frontmatter"
           "lib/inventory"
+          "lib/constraints"
           "nixosModules"
         ];
       };