with import (builtins.fetchGit {
  name = "nixos-21.05-2021-10-09";
  url = "https://github.com/nixos/nixpkgs/";
  ref = "refs/heads/nixos-21.05";
  rev = "ce7a1190a0fa4ba3465b5f5471b08567060ca14c";
}) {};

let nixpkgs-mozilla = fetchFromGitHub {
  owner = "mozilla";
  repo = "nixpkgs-mozilla";
  # commit from 2021-07-17
  rev = "0510159186dd2ef46e5464484fbdf119393afa58";
  sha256 = "1zybp62zz0h077zm2zmqs2wcg3whg6jqaah9hcl1gv4x8af4zhs6";
}; in

with import "${nixpkgs-mozilla.out}/rust-overlay.nix" pkgs pkgs;

pkgs.mkShell {

  buildInputs = [
    ((rustChannelOf { channel = "1.55.0"; }).rust)
    cargo-watch
    lld
    openssl
    pkgconfig
    sqlite
  ];

}