these 6 derivations will be built:
  /nix/store/l5j2kik16b9ff60qdh3w0bydf3dqlr7n-iets-0.1.0.drv
  /nix/store/kpfsgly30ggrs5qfvwdyz2g5a5jynl3j-closure-info.drv
  /nix/store/m3qcyziscp9qbp45hxmcha8w07sly25a-test-script.drv
  /nix/store/xz9ksf5j2j6ly0j060azdji0sja9jwqw-driverConfiguration.json.drv
  /nix/store/0611f2gi38fapvikzy0flbrfr1y80qzi-nixos-test-driver-iets-cachetest.drv
  /nix/store/l2w6kmg9kxnp2ibyk6zrf4d2k6pwyf11-container-test-run-iets-cachetest.drv