let
  nixpkgs = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.05";
    rev = "43cdc5b364511eabdcad9fde639777ffd9e5bab1";
  };
in

{
  inherit nixpkgs;
  nixos = nixpkgs // {
    suffix = "/nixos";
  };
  "channels-nixos-stable" = nixpkgs;
  "channels-nixos-unstable" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-unstable";
    rev = "6daa4a5c045d40e6eae60a3b6e427e8700f1c07f";
  };
  "nixpkgs-master" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "f9a1652a858329525c143450db2474ef439cf6c1";
  };
  "home-manager-module" = {
    url = "https://github.com/nix-community/home-manager";
    ref = "release-21.05";
    rev = "7329ffc6e911106494183557fc249180d5422929";
  };
}