anchor.diff:        };
   
       build =
  -      { tarball ? jobs.tarball { inherit disnix; }
  +      { tarball ? jobs.tarball {}
         , system ? builtins.currentSystem
  -      , disnix ? (import ../disnix/release.nix {}).build {}
         }:
   
         with import nixpkgs { inherit system; };
  
positive.code:     tarball =
        { disnixos ? {outPath = ./.; rev = 1234;}
        , officialRelease ? false
        , disnix ? (import ../disnix/release.nix {}).build {}
        }:
  
        with import nixpkgs {};
  
negative.code:       };
  
      tests = 
        let
          pkgs = import nixpkgs {};
          
          disnixos = build {
            system = builtins.currentSystem;
          };
          
          logicalNetworkNix = pkgs.writeTextFile {
  