{ config, ... }:

let
  mozRust = with builtins; (map (p: import ((fetchTarball {
    url = "https://github.com/mozilla/nixpkgs-mozilla/archive/e912ed4.tar.gz";
    sha256 = "08fvzb8w80bkkabc1iyhzd15f4sm7ra10jn32kfch5klgl0gj3j3";
  }) + p))) [
    (toPath "/lib-overlay.nix")
    (toPath "/rust-overlay.nix")
  ];
  stablepkgs = import <nixos-stable> { overlays = mozRust;};

  # https://rust-lang.github.io/rustup-components-history
  nightly = stablepkgs.rustChannelOf {
    date = "2020-06-10";
    channel = "nightly";
  };
  rustNightly = {
    rustc = nightly.rust.override {
      extensions = [
        "clippy-preview"
        "rls-preview"
        "rust-analysis"
        "rust-src"
        "rustfmt-preview"
      ]; } // { src = nightly.rust-src; };
    cargo = nightly.cargo;
  };
  rustPNightly = stablepkgs.recurseIntoAttrs (stablepkgs.makeRustPlatform  {
    inherit (rustNightly) rustc cargo;
  });

in {
  config.machine.pkgsets.rustpkgs.pkgs = (with stablepkgs; [
    diesel-cli
    carnix
    rustracer
  ]) ++ (with rustNightly; [ rustc cargo]);
}