anchor.diff:          
           composition = disnixos.disnixTest {
             name = "disnix-composition-example-composition-test";
  -          tarball = tarball {};
  -          manifest = (builds { system = "x86_64-linux"; }).composition;
  +          inherit tarball;
  +          manifest = builtins.getAttr (builtins.currentSystem) (builds.composition);
             networkFile = "deployment/DistributedDeployment/network.nix";
             testScript =
               ''
  
positive.code:         
          lookup = disnixos.disnixTest {
            name = "disnix-composition-example-lookup-test";
            tarball = tarball {};
            manifest = (builds { system = "x86_64-linux"; }).lookup;
            networkFile = "deployment/DistributedDeployment/network.nix";
            testScript =
              ''
  
negative.code:         
          loadbalancing = disnixos.disnixTest {
            name = "disnix-composition-example-loadbalancing-test";
            inherit tarball;
            manifest = builtins.getAttr (builtins.currentSystem) (builds.loadbalancing);
            networkFile = "deployment/DistributedDeployment/network.nix";
            testScript =
              ''
  