I have this rule turned on: "@typescript-eslint/no-unused-vars": "error", but am attempting to override it

    "overrides": [
        {
         "files": ["**/*.ts", "**/*.tsx"],
          "excludedFiles": "**/*.js",
          "rules": {
            "@typescript-eslint/no-unused-vars": "error"
          }
        }
      ],

essentially I want it to ignore all .js files but only to check .ts files. but when I run yarn lint it's showing errors just in .js files. any ideas?