anchor.diff:    makeSdImage =
       { module, system, ... }:
   
  -    with import nixpkgs { inherit system; };
  +    with import ./.. { inherit system; };
   
       hydraJob ((import lib/eval-config.nix {
         inherit system;
  
positive.code:   makeIso =
      { module, type, system, ... }:
  
      with import nixpkgs { inherit system; };
  
      hydraJob ((import lib/eval-config.nix {
        inherit system;
  
negative.code:   allTestsForSystem = system:
      import ./tests/all-tests.nix {
        inherit system;
        pkgs = import ./.. { inherit system; };
        callTest = t: {
          ${system} = hydraJob t.test;
        };
  