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