anchor.diff: -{ nixpkgs ? /etc/nixos/nixpkgs }:
  +{ nixpkgs ? /etc/nixos/nixpkgs 
  +, disnix #? (import ../../disnix/trunk/release.nix {}).build {}
  +}:
   
   let
     jobs = rec {
       tarball =
         { dydisnix ? {outPath = ./.; rev = 1234;}
         , officialRelease ? false
  -      , disnix ? (import ../../disnix/trunk/release.nix {}).build {}
         }:
   
         with import nixpkgs {};
  
positive.code:       };
  
      tests = 
        { nixos ? /etc/nixos/nixos
        , disnix ? (import ../../disnix/trunk/release.nix {}).build {}
        }:
        
        let
          dydisnix = build { system = "x86_64-linux"; };
  
negative.code:     build =
        { tarball ? jobs.tarball {}
        , system ? "x86_64-linux"
        }:
  
        with import nixpkgs { inherit system; };
  