Merge pull request #248920 from Atemu/update/xanmod

let

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

  ltsVariant = {

    version = "6.1.43";

    hash = "sha256-IdNW0gzYl6L3OjN2meWnGbMZsTcLfSMbKFDx12Z9Ll4=";

    version = "6.1.45";

    hash = "sha256-2UKu0ata48Rs2s+J/pI3qpgmxYRKaD8wwIZ6VulG4dg=";

    variant = "lts";

  };

  mainVariant = {

    version = "6.4.8";

    hash = "sha256-GkNWXngIx/aoSzu2pfpuv8kGwV9evbHl3hauux0lSwk=";

    version = "6.4.10";

    hash = "sha256-iRB2O0Ghh9LknqfxIf7zArS/p3iO2XEg/4R/z0QzxEQ=";

    variant = "main";

  };