self: super:

{
  dogetipbot-telegram = super.callPackage (super.fetchgit {
    url = "https://gitlab.com/nyanloutre/dogetipbot-telegram.git";
    rev = "3bf1c89aaccded42ce41452c72f7ebf6d4d056ca";
    sha256 = "1gd1wi054ihbxanvj1ac7mz5ghnxab89a0r3i4hy482sglbxqcih";
  }) { pkgs = self; };
}