diff --git a/backup.nix b/backup.nix
index 73d3084..8ad5a78 100644
--- a/backup.nix
+++ b/backup.nix
@@ -16,7 +16,7 @@ let
       coreutils
     ];
 
-    extraShellCheckFlags = [ "-x" "/etc/misskey-backup" ];
+    excludeShellChecks = [ "SC1091" ];
 
     text = ''
       source "${backupConfigFile}"