let
  nushell = self: super: { nushell = super.nushell.overrideAttrs (old: { checkPhase = ""; }); };
  pkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/20.09.tar.gz") {};
  pkgs-master = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/470e4a9bbc98b171a7e733dfc9e62531f7b9ceca.tar.gz") {
    overlays = [ nushell ];
  };
  pkgs-python = pkgs.python3.withPackages (pkgs: [ pkgs.black pkgs.mypy pkgs.pylint ]);
in
pkgs.mkShell {
  buildInputs = [
    pkgs-master.cargo-audit
    pkgs-master.nushell
    pkgs-python
    pkgs.bash
    pkgs.cargo
    pkgs.clippy
    pkgs.dash
    pkgs.fish
    pkgs.fzf
    pkgs.git
    pkgs.powershell
    pkgs.rustc
    pkgs.rustfmt
    pkgs.shellcheck
    pkgs.shfmt
    pkgs.xonsh
    pkgs.zsh
  ];
  RUST_BACKTRACE = 1;
}