blog/nix/pinned-nixpkgs.nix

builtins.fetchTarball {
  # has hugo 0.69.2
  url = "https://releases.nixos.org/nixpkgs/nixpkgs-20.09pre224406.5f14d99efed/nixexprs.tar.xz";
  sha256 = "1nx9b0nqhn8gk7jsw8z5cq3gid8h8lpcmmr2q0cmi98xg1jsq0nd";
}