(final: prev: {
  tree-sitter = prev.tree-sitter.override {
    extraGrammars = {
      tree-sitter-qmljs = {
        version = "master";
        src = final.fetchFromGitHub {
          owner = "yuja";
          repo = "tree-sitter-qmljs";
          rev = "6d4db242185721e1f5ef21fde613ca90c743ec47";
          sha256 = "S6rBQRecJvPgyWq1iydFZgDyXbm9CZBw8kxzNI0cqdw=";
        };
      };
    };
  };
})