diff --git a/helpers/services.nix b/helpers/services.nix
index 55cf0ba..299df96 100644
--- a/helpers/services.nix
+++ b/helpers/services.nix
@@ -130,7 +130,10 @@ in {
         (acc: key: let
           site = cfg.${key};
           dump = site.backup.database;
-          paths = lib.mkIf (dump != null) ["/var/backup/${key}.sql"] ++ site.backup.paths;
+          paths = builtins.concatLists [
+            site.backup.paths
+            (if dump != null then [ "/var/backup/${key}.sql" ] else [])
+          ];
           preHook = lib.mkIf (dump != null) ''
             mkdir -p /var/backup
             ${pkgs.sudo}/bin/sudo -u postgres pg_dump ${dump} > /var/backup/postgres/${key}.sql