let
  nixpkgs = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-21.05";
    rev = "bad3ccd099ebe9a8aa017bda8500ab02787d90aa";
  };
in

{
  inherit nixpkgs;
  nixos = nixpkgs // {
    suffix = "/nixos";
  };
  "channels-nixos-stable" = nixpkgs;
  "channels-nixos-unstable" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "nixos-unstable";
    rev = "fa0326ce5233f7d592271df52c9d0812bec47b84";
  };
  "nixpkgs-master" = {
    url = "https://github.com/NixOS/nixpkgs/";
    ref = "master";
    rev = "b0cf786b967590e577a63d6732dba656bb2fd25a";
  };
  "home-manager-module" = {
    url = "https://github.com/nix-community/home-manager";
    ref = "release-21.05";
    rev = "148d85ee8303444fb0116943787aa0b1b25f94df";
  };
}