these 4 derivations will be built:
  /nix/store/qbn0r496b3x637mdqkgkq64z0jr7dvsv-test-script.drv
  /nix/store/4a9qrrsl85c1lm8y7hmwg5pn1fn0mqnr-driverConfiguration.json.drv
  /nix/store/hhppcg4swi6hxq3nxhkjh79zkxm5183y-nixos-test-driver-iets-cachetest.drv
  /nix/store/9gj6lsn6l61dv01b2nmflg31s3skdqxn-container-test-run-iets-cachetest.drv