Merge pull request #262571 from Atemu/update/xanmod

let

  # These names are how they are designated in https://xanmod.org.

  ltsVariant = {

    version = "6.1.57";

    hash = "sha256-ZzZj1Ij9L6WtjEJRcOdNtZ18oFRybNPV4uID6umC2Zg=";

    version = "6.1.58";

    hash = "sha256-Lnp1CSh1jLbIkEx9hLfxhdIA12iQZmywhOec9uZ7UjI=";

    variant = "lts";

  };

  mainVariant = {

    version = "6.5.7";

    hash = "sha256-D4DMyBSaBZXHScmpkC3/fKlDylO1xVSZhar2F5bMjkY=";

    version = "6.5.8";

    hash = "sha256-lHi+O7RE6YdiqPmuxHajGkc7jS9F5cB89+JbTVKkB/c=";

    variant = "main";

  };