diff --git a/flake.nix b/flake.nix
index 15618d502..5c171f225 100644
--- a/flake.nix
+++ b/flake.nix
@@ -113,6 +113,7 @@
           filter =
             path: type:
             (builtins.match ".*nginx.conf.template$" path != null)
+            || (builtins.match ".*payjoin-mailroom/README\\.md$" path != null)
             || (builtins.match ".*\\.mmdb$" path != null)
             || (builtins.match ".*\\.html$" path != null)
             || (craneLibVersions.msrv.filterCargoSources path type);