let
  nixpkgs = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.11";
    rev = "9bc0e974545d5bc4c24e1ed047be0dc4e30e494b";
  };
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 = "530a53dcbc9437363471167a5e4762c5fcfa34a1";
  };
  "channels-nixos-unstable" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-unstable";
    rev = "83658b28fe638a170a19b8933aa008b30640fbd1";
  };
  "nixpkgs-master" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "01c1bb59d04b4ab2455fe27c0747807323f46576";
  };
  "home-manager-module" = {
    url = "https://github.com/nix-community/home-manager";
    ref = "release-21.11";
    rev = "d93d56ab8c1c6aa575854a79b9d2f69d491db7d0";
  };
}