options: let
    combinedOptions = options // {
        overlays = [
            (import ../nixpkgs-mozilla/rust-overlay.nix)
            (import (fetchTarball https://git.cryto.net/joepie91/morepkgs/archive/master.tar.gz))
            (self: super: {
                jre8Plugin = super.jre8Plugin.overrideAttrs (drv: {
                    src = ../sources/jdk-8u141-linux-x64.tar.gz;
                });
            })
        ];
    };
in {
    master = (import (fetchTarball https://github.com/NixOS/nixpkgs/archive/master.tar.gz) combinedOptions);
    /* unstable = (import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz) combinedOptions); */
    unstable = (import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/e05a926713441a4ec632c7b793448654f7c2056d.tar.gz) combinedOptions);
    /* unstable = (import <nixpkgs>) combinedOptions; */
    nixpkgs = (import <nixpkgs>) combinedOptions;
    myNixpkgs = (import ../packages) {};
}