let
  nixpkgs = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.11";
    rev = "ed02c2ba0384b2800db41333045a6fb781f12aac";
  };
in

{
  inherit nixpkgs;
  nixos = nixpkgs // {
    suffix = "/nixos";
  };
  "channels-nixos-stable" = nixpkgs;

  "channels-nixos-21.05" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.05";
    rev = "0fd9ee1aa36ce865ad273f4f07fdc093adeb5c00";
  };
  "channels-nixos-unstable" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-unstable";
    rev = "3e072546ea98db00c2364b81491b893673267827";
  };
  "nixpkgs-master" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "9fdffcf86e25f7dc6d5bd25932035e5a3b9a15e6";
  };
  "home-manager-module" = {
    url = "https://github.com/nix-community/home-manager";
    ref = "release-21.11";
    rev = "2860d7e3bb350f18f7477858f3513f9798896831";
  };
}