anchor.diff: -{ nixpkgs ? <nixpkgs>
  -, systems ? [ "i686-linux" "x86_64-linux" ]
  -}:
  +{ nixpkgs ? <nixpkgs> }:
   
   let
     pkgs = import nixpkgs {};
  
positive.code:   jobs = rec {
      tarball =
        { disnix ? {outPath = ./.; rev = 1234;}
        , dysnomia ? builtins.getAttr (builtins.currentSystem) ((import ../dysnomia/release.nix {}).build {})
        , officialRelease ? false
        }:
  
  
negative.code:             environment.systemPackages = [ pkgs.stdenv pkgs.nix disnix ];
            };
        in
        with import "${nixpkgs}/nixos/lib/testing.nix" { system = builtins.currentSystem; };
        
        {
          install = simpleTest {
  