Merge pull request #206527 from ncfavier/tree-sitter-unionOfDisjoint

          knownTreeSitterOrgGrammarRepos);

    in

    mergeAttrsUnique otherGrammars treeSitterOrgaGrammars;

  # TODO: move to lib

  mergeAttrsUnique = left: right:

    let intersect = lib.intersectLists (lib.attrNames left) (lib.attrNames right); in

    assert

    lib.assertMsg (intersect == [ ])

      (lib.concatStringsSep "\n" [

        "mergeAttrsUnique: keys in attrset overlapping:"

        "left: ${lib.generators.toPretty {} (lib.getAttrs intersect left)}"

        "right: ${lib.generators.toPretty {} (lib.getAttrs intersect right)}"

      ]);

    left // right;

    lib.attrsets.unionOfDisjoint otherGrammars treeSitterOrgaGrammars;