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