{ pkgs ? import <nixpkgs> {} }:
let fetchurl = args@{url, sha256, ...}:
  pkgs.fetchurl { inherit url sha256; } // args;
    fetchFromGitHub = args@{owner, repo, rev, sha256, ...}:
  pkgs.fetchFromGitHub { inherit owner repo rev sha256; } // args;
in rec {

  stable = fetchurl rec {
    version = "1.8.6";
    url = "https://dl.winehq.org/wine/source/1.8/wine-${version}.tar.bz2";
    sha256 = "1lq6770pkv3342ss2ih18s2hw6i1srbcfg3mljwalqrvxfb7hydi";

    ## see http://wiki.winehq.org/Gecko
    gecko32 = fetchurl rec {
      version = "2.40";
      url = "http://dl.winehq.org/wine/wine-gecko/${version}/wine_gecko-${version}-x86.msi";
      sha256 = "00nkaxhb9dwvf53ij0q75fb9fh7pf43hmwx6rripcax56msd2a8s";
    };
    gecko64 = fetchurl rec {
      version = "2.40";
      url = "http://dl.winehq.org/wine/wine-gecko/${version}/wine_gecko-${version}-x86_64.msi";
      sha256 = "0c4jikfzb4g7fyzp0jcz9fk2rpdl1v8nkif4dxcj28nrwy48kqn3";
    };
    ## see http://wiki.winehq.org/Mono
    mono = fetchurl rec {
      version = "4.6.3";
      url = "http://dl.winehq.org/wine/wine-mono/${version}/wine-mono-${version}.msi";
      sha256 = "1f98xwgv665zb9cwc5zphcdbffyh3sm26h62hzca6zlcwy5fi0zq";
    };
  };

  unstable = fetchurl rec {
    version = "2.0-rc3";
    url = "https://dl.winehq.org/wine/source/2.0/wine-${version}.tar.bz2";
    sha256 = "0sq8li7p30h2a5bbpv27vxpzihr8h890qm78nq21fnh0zflg8x8y";
    inherit (stable) mono;
    gecko32 = fetchurl rec {
      version = "2.47";
      url = "http://dl.winehq.org/wine/wine-gecko/${version}/wine_gecko-${version}-x86.msi";
      sha256 = "0fk4fwb4ym8xn0i5jv5r5y198jbpka24xmxgr8hjv5b3blgkd2iv";
    };
    gecko64 = fetchurl rec {
      version = "2.47";
      url = "http://dl.winehq.org/wine/wine-gecko/${version}/wine_gecko-${version}-x86_64.msi";
      sha256 = "0zaagqsji6zaag92fqwlasjs8v9hwjci5c2agn9m7a8fwljylrf5";
    };
  };

  staging = fetchFromGitHub rec {
    inherit (unstable) version;
    sha256 = "1nk8s54nrlws0d8wpyj1vv2z0l2jansn990xw73v15wzwc3j9p6l";
    owner = "wine-compholio";
    repo = "wine-staging";
    rev = "v${version}";
  };

  winetricks = fetchFromGitHub rec {
    version = "20170101";
    sha256 = "0c2aam68x3nlvc6f4r6rnfw6y3a86644zb0qirwkmh3p04mpdl39";
    owner = "Winetricks";
    repo = "winetricks";
    rev = version;
  };

}