anchor.diff:  let
     inherit (release) mapTestOn packagePlatforms pkgs all linux darwin;
   
  +  system = "x86_64-darwin";
  +
     mapPlatforms = systems: pkgs.lib.mapAttrs (n: v: systems);
   
  -  genExample = configuration: pkgs.lib.genAttrs [ "x86_64-darwin" ] (system:
  -    (import ./. { inherit nixpkgs configuration system; }).system
  +  buildFromConfig = configuration: sel: sel
  +    (import ./. { inherit nixpkgs configuration system; }).config;
  +
  +  makeSystem = configuration: pkgs.lib.genAttrs [ system ] (system:
  +    buildFromConfig configuration (config: config.system.build.toplevel)
     );
   
     makeTest = test:
  
positive.code:             out = config.system.build.toplevel;
            };
          };
  
        system = "x86_64-darwin";
      in
        (import ./. { inherit nixpkgs configuration system; }).config.system.build.run-test;
  
    release = import <nixpkgs/pkgs/top-level/release-lib.nix> {
      inherit supportedSystems scrubJobs;
  
negative.code:       meta.description = "Release-critical builds for the darwin channel";
      };
  
      manualHTML = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manualHTML);
      manualEpub = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manualEpub);
      manpages = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manpages);
      options = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.optionsJSON);
  
      examples.hydra = makeSystem ./modules/examples/hydra.nix;
      examples.lnl = makeSystem ./modules/examples/lnl.nix;
      examples.simple = makeSystem ./modules/examples/simple.nix;
  
      tests.activation-scripts = makeTest ./tests/activation-scripts.nix;
      tests.checks-nix-gc = makeTest ./tests/checks-nix-gc.nix;
  