let
  nixpkgs = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.05";
    rev = "973910f5c31b9ba6c171c33a8bd7199990b14c72";
  };
in

{
  inherit nixpkgs;
  nixos = nixpkgs // {
    suffix = "/nixos";
  };
  "channels-nixos-stable" = nixpkgs;
  "channels-nixos-unstable" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-unstable";
    rev = "dd14e5d78e90a2ccd6007e569820de9b4861a6c2";
  };
  "nixpkgs-master" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "beb353c7765ad6ea632acccb26f0d63c8c12d06b";
  };
  "home-manager-module" = {
    url = "https://github.com/nix-community/home-manager";
    ref = "release-21.05";
    rev = "9c0abed5228d54aad120b4bc757b6f5935aeda1c";
  };
}